UNSOLVED DISAPPEARANCE: BRIAN SHAFFER

When an Ohio medical student disappears into thin air during a night out, a massive investigation fails to uncover any trace of him. One of the Midwest’s most baffling mysteries is explored in this episode of Last Seen Alive.

Sources used to research this episode:


The Missing: Brian Shaffer (ID Channel)

A Guy Walks Into a Bar … And Is Never Seen Again (MEL Magazine / Kirk Pepi)

Unsolved Mystery: 10 Years Later, Brian Still Missing (Dispatch.com / Mike Wagner)

In the Name of the Father (April Johnston / Columbus Monthly)

When Missing Persons Cases Go Cold (Michelle Sullivan / Columbus Monthly)

Into Thin Air (NBC News / Rob Stafford)

Prevalence of Depression, Depressive Symptoms, and Suicidal Ideation Among Medical Students: A Systematic Review and Meta-Analysis (PubMed / Lisa S. Rotenstein et all)

Dateline NBC’s Brian Shaffer Story (Video)

From the Archives: What Happened to Brian Shaffer? (Columbus Dispatch)

If you have any information on the disappearance of Brian Shaffer, contact the Columbus Police at  (614) 645-4545 or the Central Ohio Crime Stoppers at 614-461-8477. Or, submit an anonymous tip to Central Ohio Crime Stoppers online at their website: stopcrime.org.

UNSOLVED HOMICIDE: ENRIQUE ROMAN-MARTINEZ

When a group of paratroopers hits a North Carolina beach for a laid-back holiday weekend, one of their own goes missing. Tragic evidence washes ashore and ignites one of 2020’s most devastating missing / murdered American soldier investigations in this episode of Last Seen Alive.

Sources used to research this case:

Spc. Enrique Roman-Martinez: Unsolved Homicide (Dept. of the Army Criminal Investigation Division)

Inconsistencies in Account of Paratrooper’s Disappearance and Homicide Trouble His Family (Army Times / Kyle Rempfer)

‘It Was Such a Brutal Crime:’ Autopsy Report Shows 82nd Soldier Was Decapitated (Steve DeVene / The Fayetteville Observer)

Mystery Deepens As 911 Call Released in Case of Fort Bragg Paratrooper Whose Body Was Found in Outer Banks (ABC11 / Jessica De Nova)

‘It Was Such a Brutal Crime:’ Autopsy Report Shows 82nd Soldier Was Decapitated (The Fayetteville Observer/ Steve DeVane)

Family of Decapitated Soldier to Sue Army over Unsolved Homicide (Drew F. Lawrence / military.com)

Fort Bragg Paratroopers’ Homicide Cold Case Marks Five Years (Reuben Jones / Spectrum News 1)

7 Soldiers Who Last Saw Paratrooper Alive Before He Was Found Decapitated are Facing Courts-Martial on Other Charges (CBS News)

All Seven Soldiers Who Last Saw Paratrooper Alive Face Charges (Rachael Riley / The Fayetteville Observer)

Fort Bragg Soldiers Face Court Martial in Comrade’s Death (Fox 7 Austin)

Another Fort Bragg Soldier Who Last Saw Decapitated Paratrooper Alive Sentenced (Rachael Riley / The Fayetteville Observer)

‘Corpse Dismemberment in the Material Collected by the Department of Forensic Science, Cracow, Poland’ (Legal Medicine / Tomasz Konopka, Marcin Strona, Filip Bolechała, Jerzy Kunz)

Global Drug Survey: 2019 (Professor Adam Winstock et al. / Global Drug Survey Core Research Team)

Killer High: Exploring the Phenomenon of LSD-Fueled Murder (Gavin Butler / VICE)

Exclusive: Army Files Charges in Mysterious Fort Bragg Beheading Case (Seth Harp / Rolling Stone)

If you have any information about the murder of Enrique Roman-Martinez, please contact the Army Criminal Investigation Command at 910-396-8777, or CLICK HERE to submit a tip online–you may remain anonymous if you wish.

The US Army is offering a reward of up to $50,000 for credible information leading to the identification, arrest, and conviction of the individual(s) responsible for Enrique’s death and dismemberment.

NOW SOLVED: HOMICIDE OF REBECCA PARK

When a medical student and military reserve officer disappears during a run through a Philadelphia park, foul play is immediately suspected. The discovery of her body incriminates a deadly serial offender who is finally identified and charged in this special, updated episode of Last Seen Alive.

DECEMBER 2023 UPDATE: We originally aired an episode on Rebecca’s unsolved murder in 2020. In December of 2023, Philadelphia police identified Elias Diaz, age 46, as Rebecca’s alleged killer. He was charged with her murder–and an assortment of related charges–on December 20th, 2023 (see charges listed on court document below). Bail was denied. He has also been charged in relation to two other attacks committed in November of 2023. The total number of his victims isn’t known for sure, and Philadelphia Police are seeking any information that could lead to additional charges against Diaz.

You can find our update episode on Rebecca’s case, featuring the latest information available as of 12/20/2023, wherever you listen to podcasts.

Sources used to research this episode:

Suspect in Pennypack Trail Slashings Charged with 2003 Fairmount Park Rape and Murder (NBC10 Staff / NBC10 Philadelphia)

Man Charged in 20-Year-Old Philadelphia Cold Case Killing and Rape After DNA Link, Officials Say (Celina Tebor and Danny Freeman / CNN)

Elias Diaz charged with 2003 Philadelphia cold case murder of Rebecca Park (Alexandra Simon, Aliza Shuler and Joe Holden / CBS News Philadelphia)

Runner’s Life Was Rife with Promise, Rebecca Park’s Friends and Family Recall Her Strength, Energy (Natalie Pompilio / Philadelphia Enquirer)

Body Identified as Missing Student in Philadelphia (Los Angeles Times)

Literally the Calvary: Meet the Philadelphia Police Department’s Mounted Cops (Billy Penn)

Running While Female (Runner’s World / Michelle Hamilton)

FBI, Police Continue Search for Fairmount Park Rapist 16 Years Later (NBC Philadelphia)

DNA Tool May Help in Fairmount Park Rapist Cold Case (ABC6)

Search Continues for Fairmount Park Rapist (Northeast Times / William Kenny)

If you have any information that could lead to additional charges against Diaz, please call 215-686-8477 to report what you know to Philadelphia Police.

UNSOLVED HOMICIDE: DAVID COX

When a young Marine Corps veteran has an unwelcome spotlight cast upon his life by Hollywood, murder soon follows. An execution-style killing in the Massachusetts woods cuts a young life short and baffles investigators in this episode of Last Seen Alive.

Sources used to research this episode:

Guantanamo Gazette Vol. 45–No. 166 (US NAVY)

Ex-Marine Who Felt ‘A Few Good Men’ Maligned Him is Mysteriously Murdered (Baltimore Sun / Bill Glauber)

Cold Case: Who Killed David Cox, Marine Who Inspired ‘A Few Good Men’? (Atlanta Journal Constitution / Boston 25 News)

Unsolved Mysteries: David Cox (Unsolved Mysteries)

New England’s Unsolved: Who Killed US Marine David Cox? (Bob Ward / Boston 25 News)

‘It Was Definitely an Execution-Style Shooting’: The Unsolved Murder of a Marine Whose Story Inspired ‘A Few Good Men’ (Emily Sweeney / The Boston Globe)

If you know anything about the murder of David Cox, please contact the Massachusetts State Police assigned to the Norfolk County District Attorney’s Office at: 617-593-8840.

UNSOLVED HOMICIDE: NANETTE KRENTEL

When a Louisiana woman’s worst fears come true, investigators are left to sift through the ashes of the home she shared with her fire chief husband. Arson and betrayal complicate the search for truth in this episode of Last Seen Alive.

Sources used to research / write this episode:

St. Tammany Fire District Chief’s Wife Believed to be Victim in Fatal Lacombe House Fire (Sara Pagones / The Advocate)

Who Killed Nanette Krentel? What We Know About What Happened and When (WWLTV / Katie Moore)

(VIDEO) Mystery in Ashes: the Nanette Krentel Story–Who Killed Nanette Krentel? (WWLTV)

(VIDEO) Mystery in Ashes: The Nanette Krentel Story–“He threatened to burn down the house.” (WWLTV)

Sheriff Releases New Details on Nanette Krentel Homicide Probe (FOX8 / Kelly Weston)

Nanette Krentel Case: Sheriff Gives New Details, Whereabouts of Key Figures During Shooting, Fire (NOLA.COM / Sara Pagones)

Why Fire Chief Wife’s Death in Her Burned-Down House Is the ‘Perfect Story for Social Media Trolls’ (Christine Pelisek / people.com)

Fire Chief Who Cheated on Wife Is Still in Complete Shock After Her 2017 Unsolved Murder (Christine Pelisek / people.com)

Emails Show She Feared Her House Could be Set on Fire Before She Was Found Dead in the Ashes (WWLTV / Katie Moore)

Nanette Krentel’s Slaying Leaves Family with Questions, Doubts About the Investigation (NOLA.COM)

Nanette Krentel Case Remains Unsolved 7 Years Later (Sula Kim / WDSU News)

North Shore Homicide Detectives Examine Fire Dept. Probe of Former Chief Stephen Krentel (Robert Rhoden / nola.com)

Inside the Mysterious Murder and Burning of a Small-Town Fire Chief’s Wife (Christine Pelisek / people.com)

Firefighter Comes Forward With Explosive Allegations Against Covington Fire Chief (Fox8 News)

Embattled LA Chief Announces Retirement (Sarah Pagones / Firehouse.com)

Court Rules Against Sheriff Who Had Ex-Deputy Arrested, Strip Searched Over Email Criticism (Richard A. Webster / Louisiana Illuminator)

Arrest of Man Who Criticized St. Tammany Sheriff’s Office Drew FBI Scrutiny, Court Filing Says (WWLTV News)

JERRY ROGERS, JR., Plaintiff v. SHERIFF RANDY SMITH, DANNY CULPEPER, and KEITH CANIZARO (UNITED STATES DISTRICT COURT EASTERN DISTRICT OF LOUISIANA)

If you know anything about the death of Nanette Krentel, please contact Crime Stoppers at (504) 822-1111.

UNSOLVED HOMICIDE: DIANA ROBERTSON

When a young family ventures into a remote Washington forest in search of the perfect Christmas tree, a dark mystery unfolds. Parents go missing, a child is found wandering alone in another town and all of Washington state wonders whether a serial predator may be waiting in the woods in this episode of Last Seen Alive.

Sources used to research this episode:

Diana Robertson (Unsolved Mysteries)

Mineral: Diana Robertson (Washed Away Podcast)

Parents Missing (Associated Press)

Father Presses Hunt for Missing Couple (Associated Press)

Woman’s Body Found (Associated Press)

Woman’s Body Discovered (The Spokesman-Review, Feb. 20, 1986 ed.)

Body Identified As Trapper’s Girlfriend (Associated Press)

Woman Was Slain, Her Boyfriend’s Still Missing (Associated Press)

Puyallup Father Continues Hunt for Clues in Couple’s Disappearance (Associated Press)

Police Say Boyfriend Could Be Slaying Suspect (Seattle Post-Intelligencer / George Foster)

Bureau of Justice Statistics Selected Findings: Female Victims of Violence (Bureau of Justice Statistics)

Skull Discovery Revives Washington Mystery (The Seattle Times)

Mystery Lingers: Discovery of Trapper’s Skull Adds Clue to Couple’s 1985 Disappearance (The Olympian / Stacey Mulick)

Discovery of Skull Raises New Questions About 1980s Murders (Stacey Mulick / The News Tribune)

Are Cases Tied? (Ellensburg Daily Record)

Authorities Try to Identify Skull (The News Tribune)

Headless Body May Be Missing Woman (The News Tribune)

Death Listed As Suicide (The Olympian)

Baffling Deaths Haunt County (Dave Hendrick / The Olympian)

If you know anything about the deaths of Diana Robertson or Michael Riemer, please contact the Lewis County Sheriff’s Office at: 360-748-9286.

UNSOLVED DISAPPEARANCE: CINDY (HYUN JONG) SONG

When a Penn State University senior disappears without a trace on Halloween night, only one thing is clear: she didn’t vanish voluntarily. A heartbreaking mystery leads to a tale of real-life monsters in this episode of Last Seen Alive.

Sources used to research this episode:

Unsolved Mysteries: Cindy Song (Unsolved Mysteries)

Korean-Born Penn State Student ‘Just Vanished’ After Party (Pittsburgh Post-Gazette / Tom Gibb)

8 Years After Penn State Student Disappeared, Case Narrows to 1 Active Lead (Penn Live / Sara Ganim)

Who Abducted Cindy Song? Unpacking the Cold Case of the Halloween Bunny that Disappeared Into the Night (Nathan Jolly / new.com.au)

Grand Jury: Dozen Bodies Found in Hugo Selenski’s Backyard (Elizabeth Skrapits / The Daily Call)

Documentary Focuses on Missing Student Case (Sharon Johnson / The Patriot-News)

Police Still Searching for Missing PSU Student (L. Deshan Crittenden / Centre Daily Times)

Police Hope Acquaintances Will Provide Clues to Whereabouts of Missing Student (L. Deshan Crittenden / Centre Daily Times)

Missing Student Case Unsolved (Dan Lewerenz / York Daily Record)

Search for Missing Penn State Student Continues (Dan Lewerenz / York Daily Record)

Has Cindy Song Been Forgotten? (Thomas Bassigner / The Patriot-News)

Song Case Still Gets Attention (Adam Smeltz / Centre Daily Times)

If you know anything about the disappearance of Cindy (Hyun Jong) Song, please contact the Ferguson Township Police at 814-237-1172.

UNSOLVED SUSPICIOUS DEATH: TOM BROWN

When a small town Texas teen goes missing, an entire community turns out to search the high prairie by land and air. A mysterious death, a contentious debate and shocking accounts of corruption are explored in this episode of Last Seen Alive.

Sources used to research this episode:

Joint Statement of the Office of the Texas Attorney General And the 31st Judicial District Attorney’s Office (Texas Attorney General’s Office)

Podcast: Tom Brown’s Body (Texas Monthly via Spotify)

ArcGIS Stories: Tom Brown’s Body (Chris Lee / ArcGIS Story Maps)

High School Senior Thomas Brown Missing from Texas After Vanishing Over Thanksgiving 2016 (NBC News)

Family Asking for Prayers After Remains of Missing Texas Teen Thomas Brown Identified (NBC News)

Panhandle Community Searches for Evidence Regarding Thomas Brown’s Disappearance (ABC7 News)

TCOLE Investigation Reveals New Information About Thomas Brown Case (ABC7 News)

Remains of Missing Texas Teen Discovered Two Years After He Disappeared Under Mysterious Circumstances (Oxygen)

‘It’s disappointing’: Thomas Brown’s mom reacts to suspension of AG’s investigation (KFDA Amarillo News)

‘Sheriff Pearson Responds (The Canadian Record)

New Details Released in Canadian Teen’s Death (Niccole Caan / ABC7 News Amarillo)

Wolfe City Police Officer Arrested (City of Bonham / NTXE News)

Apple Launches New Repair Program for iPhone 6s Units Affected by Unexpected Shutdowns (Chance Miller / 9to5Mac.com)

Investigation into Hemphill County Sheriff Closed, 31st District Attorney Says (Kaley Green / myhighplains.com)

Hemphill County Deputy Let Go Following Letter Addressing Credibility from County Attorney (ABC7 News)

What is the Average Walking Speed? (Medical News Today)

An Explanation on Brady Letters (Joe C. Tooley, J.D. / TMPA)

If you know anything about the death of Tom Brown, please contact the Texas Attorney General Criminal Investigation Division at 512-463-2100.

UNSOLVED HOMICIDE: LISA AU

When a young Hawaiian woman leaves a dinner party on a torrentially rainy night, the journey turns deadly—and not because of the weather. Fear grips the Island of Oahu as police search for a killer within their own ranks in this episode of Last Seen Alive.

Sources used to research to research this episode:

37 Years Ago, Her Murder Gripped Oahu. But From the Start, the Investigation Went Astray (Hawaii News Now)

Lisa Au (Honolulu Star Bulletin via newspapers.com)

Female Body Discovered on Tantalus (Charles Memminger / Honolulu Star Bulletin via newspapers.com)

Mystery Remains Decades After Hawaii Teen Lisa Au Was Found Dead In 1982 (Aaron Rasmussen / Investigation Discovery)

Officers Hunt Au’s Killer; Fake Policemen Reported (Honolulu Star Bulletin)

Lisa Au’s Parents Seek Second Look (Charles Memminger / Honolulu Star Bulletin via newspapers.com)

Au Family Sues City Again (Honolulu Star Bulletin via newspapers.com)

Testimony of 2 Policemen Cited in Au Damages Suit (Lee Catterall / Honolulu Star Bulletin via newspapers.com)

Lisa Au Case Symbol of Senseless Slayings (Honolulu Star Bulletin via newspapers.com)

AU: Her Family Wants Federal Agents to Intervene (Honolulu Star Bulletin via newspapers.com)

Detectives Hope DNA Can Link Man To Oahu’s Serial Killings (KITV)

Video: Lynn Kawano Investigates: Buried Evidence: The Lisa Au Case (Hawaii News Now / Lynn Kawano)

Is the Honolulu Strangler Dead or Still at Large? (ActiveFugitives.com)

State and Island Population 1960-2010 (hawaii.gov)

If you know anything about what happened to Lisa Au, please call the Honolulu Police Department at 808-529-3111 and share what you know. Or, if you prefer, you can click here to report a tip at website—honolulupd.org.

UNSOLVED DISAPPEARANCE: AMY WROE BECHTEL

When an accomplished long distance runner hits the trails in the central Wyoming mountains and never returns, investigators are tasked with answering the question: what—or who—did this Olympic hopeful fail to outrun? Strange journals, a serial killer with a history of terrible crimes against women and other theories are explored in this episode of Last Seen Alive.

Sources used to research this episode:

Long Gone Girl (Runner’s World / Jon Billman)

Since She’s Been Gone (Deirdre Stoelzle / Casper Star Tribune)

Unsolved Mysteries: Amy Wroe Bechtel (Unsolved Mysteries)

When Amy Bechtel Didn’t Come Home (Outside Magazine)

Bureau of Justice Statistics Selected Findings: Female Victims of Violence (BJS)

Break in Great Basin Murders? (ABC7 Denver)

Authorities to Investigate New Leads in the 1997 Disappearance of Amy Wroe Bechtel (Wyoming Public Radio / Sara Hossaini)

Dale Wayne Eaton “The LIL Miss Killer” (Radford University Serial Killer Information Center)

Profilers: Denver Woman’s Murder Points to Serial Killer (ABC7 Denver)

The Disturbing Disappearance of Runner Amy Wroe Bechtel in Wyoming (StrangeOutdoors.com)

Running While Female (Runner’s World / Michelle Hamilton)

Fund-Raisers to Benefit Bechtel Search (Emily McNeil / Casper Star-Tribune)

‘He Tried to Kill Us’ Woman Who Escaped Eaton Testifies Today (Casper Star-Tribune)

Bear Attacks Statistics 2025 – Global Injuries & Fatalities (Alexander Laybourne / World Animal Foundation)

Risk and Recreation: What We Know About Mountain Lion Attacks in North America (Mountain Lion Foundation)

Wolf Attacks on Humans: An Update for 2002–2020 (John D. C. Linnell, Ekaterina Kovtun & Ive Rouart)

If you know anything about Amy Wroe Bechtel’s disappearance, please contact the Fremont County Sheriff’s Office at 307-332-5611.