The Anglin brothers — John and Clarence — were incarcerated at Alcatraz Federal Penitentiary after being convicted for bank robberies across the Midwest and sentenced to long federal terms. They were transferred to Alcatraz in the early 1960s, where they remained until they disappeared from the island in June 1962. Their presence at Alcatraz stemmed from prior escapes from state facilities and their designation as high-risk inmates, making the federal prison the only secure setting for their custody. This evergreen explainer outlines why they were held there, how they escaped, and what subsequent investigations have concluded, drawing on FBI case files, Bureau of Prisons reports, and trial records.
Who Were the Anglin Brothers
John and Clarence Anglin were American brothers born in the 1920s in Florida. Both were career criminals with extensive histories of burglary and robbery before their transfers to Alcatraz. Their criminal records included arrests across multiple states, which influenced the decision to house them at the highest-security federal facility available at the time. Prior to Alcatraz, each had served time in state prisons, but the severity of their offenses and their repeated escape attempts made them candidates for the island penitentiary.
Criminal Backgrounds Leading to Alcatraz Transfer
- John Anglin: Convicted of bank robbery and sentenced to a lengthy federal term.
- Clarence Anglin: Convicted of similar offenses, with a record of escape attempts.
- Joint history: Both repeatedly violated parole, resulting in transfers between federal and state custody.
Alcatraz as a Custody Destination
Alcatraz was reserved for the most difficult prisoners, including those with violent histories, escape records, or those who posed significant challenges at other facilities. The Anglin brothers fit multiple criteria: prior escapes, repeat offenses, and determined behavior. Their transfer to Alcatraz reflected an effort to isolate them from criminal networks and reduce opportunities for escape, though the prison’s eventual reputation for inescapability would be tested by their 1962 break.
The 1962 Escape From Alcatraz
On the night of June 11, 1962, John and Clarence Anglin, along with Frank Morris, escaped from Alcatraz. They crafted makeshift tools, removed prison-built covers from wall vents, and ascended to the roof, from which they launched a raft of rain barrels into San Francisco Bay. The FBI investigation that followed produced extensive forensic and testimonial evidence, though no bodies were recovered at the scene. The official position has consistently been that the three men likely drowned, though uncertainties in the record have fueled ongoing speculation.
Escape Plan and Execution
| Step | Action | Purpose |
|---|---|---|
| 1 | Create dummy heads for beds | Delay discovery of their absence |
| 2 | Excavate vent holes with improvised tools | Access the roof undetected |
| 3 | Construct a raft from rain barrels | Travel across the bay |
Official Investigations and Evidence
The FBI led a massive search and evidence-gathering effort after the escape, interviewing witnesses, reviewing tidal data, and analyzing physical clues found on the island and nearby shorelines. No definitive proof of survival emerged, and the FBI formally closed its active investigation in 2012. Bureau of Prisons records, court documents, and coroner reports from the era confirm the men were incarcerated at Alcatraz until the night of the escape. Doubt remains in public discourse, but authorities maintain the probable-drowning conclusion based on environmental conditions and lack of confirming evidence.
Summary of Key Facts
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Names | John Anglin, Clarence Anglin | Prison records |
| Alcatraz Arrival | Early 1960s | BOP transfer logs |
| Escape Date | June 11–12, 1962 | FBI case file |
| Outcome | Presumed drowned; no confirmed survival | FBI investigation, coroner reports |
Legacy and Public Interest
The Anglin brothers’ disappearance from Alcatraz remains one of the most enduring mysteries in American penology. Documentaries, books, and television episodes have revisited the case, yet primary sources consistently point to a probable drowning and unsuccessful escape attempt. Their time at Alcatraz reflects a period when the federal government sought to contain criminals deemed beyond the capacity of conventional prisons, and their escape highlighted the limits of even the most secure facilities.
Conclusion
The Anglin brothers were held at Alcatraz because of their criminal histories, escape records, the need for high-security confinement, and the federal desire to isolate them from further criminal activity. Their 1962 escape produced conclusive evidence of their likely demise, but the absence of recovered remains has left questions unanswered. The factual record from FBI, Bureau of Prisons, and court materials supports the conclusion that they were incarcerated at Alcatraz and that their fate following the escape was almost certainly fatal.