Episode 191: John Tamm – Frank Sheeran, The Irishman

Retired agent Q. John Tamm served in the FBI for nearly 30 years. He spent most of his career in the Philadelphia Division working complex organized crime, labor racketeering, political corruption, civil rights, street gangs, and illegal drugs investigations. In this episode of FBI Retired Case File Review, John Tamm reviews his investigation of Teamster Union Official Frank Sheeran for racketeering and the movie The Irishman, directed by Martin Scorsese with Al Pacino, and Joe Pesci, and starring Robert DeNiro as Frank Sheeran. Tamm specifically addresses Sheeran’s claims he killed Jimmy Hoffa and was a mob hitman. John Tamm is a recognized expert on labor racketeering matters.

Later in his Bureau career, Tamm served for a short period in the Atlantic City Resident Agency out of the Newark Division, and spent several years as a Supervisory Special Agent on the Justice Task Force conducting informant management evaluations and criminal employee misconduct investigations relating to the John Connolly and Whitey Bulger case in the Boston Division.

John Tamm’s last assignment before retiring was serving as an FBI liaison to the National Commission on Terrorist Attacks (9-11 Commission) and as a member of the professional staff of the Commission. After retirement, he worked for government contractor Booz Allen Hamilton as a military, law Enforcement and Intelligence consultant. Currently, he is employed as a principal administrative officer of the Presbytery of Eastern Virginia.

Special Agent (Retired)

Q. John Tamm

1975 – 2004







“Frank Sheeran struck me as someone who always used somebody else to do the violent deeds he wanted done. Did Sheeran lull Hoffa? It’s possible, but he didn’t shoot him.”  Retired Agent John Tamm

Labor racketeering is the domination, manipulation, and control of a labor movement in order to affect related businesses and industries. Labor unions provide a rich source for organized criminal groups to exploit: their pension, welfare, and health funds. (FBI Website: Organized Crime)

The following are news articles about John Tamm’s investigation and the various prosecutions of teamster union official Frank Sheeran, in addition to articles and video regarding the movie The Irishman about Sheeran’s life and the disappearance of teamster leader Jimmy Hoffa:

Philadelphia Daily News – 2/13/1979:  Mob Whos Who in Crime

Philadelphia Daily News – 2/23/1980:  Sheeran Acquitted,  Cont. Sheeran Acquitted of Racketeering

Philadelphia Daily News – 4/9/1981:  Sheeran Target for Hired Gun,  Sheeran Target for Hired Gun – Cont.

Philadelphia Inquirer – 11/1/1981:  Car caught union leader in FBI net

Philadelphia Inquirer – 11/1/1981:  Squad 4 keeps union on toes,   Squad 4 – Cont. 1,   Squad 4 – Cont. 2

The Irishman | Official Teaser (VIDEO)

Slate Magazine – 8/17/2019: The Lies of the Irishman

Frank Sheeran served 13 years in prison for labor racketeering.










Author Charles Brandt claims that Sheeran confessed to killing Hoffa and committing approximately 25 other mob hits.













The Irishman | Official Teaser (VIDEO)









Jerri Williams

View posts by Jerri Williams
Jerri Williams, a retired FBI agent, author and podcaster, attempts to relive her glory days by writing crime fiction and hosting FBI Retired Case File Review, a true crime podcast available for free subscription on Apple Podcast, Google Podcast, Spotify, and other popular podcast apps. Her nonfiction book FBI Myths and Misconceptions: A Manual for Armchair Detectives and her FBI corruption squad police procedural series featuring Special Agent Kari Wheeler are available wherever books are sold.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Scroll to top