A secret 2013 letter—allegedly written by one of the three men long believed to have drowned after escaping Alcatraz—shatters the official narrative by claiming survival, decades of life in hiding, and a final plea for help, reopening the most infamous prison mystery with unsettling new doubt and emotional weight.

In January 2013, a yellowed, hand-written letter quietly arrived at the San Francisco Police Department before being forwarded to the FBI, triggering a secret internal review that would reopen one of America’s most iconic criminal mysteries.

The letter claimed to be written by John William Anglin—one of the three inmates who escaped Alcatraz Federal Penitentiary on the night of June 11, 1962, in an operation so daring and so improbable that authorities declared all escapees drowned in the freezing San Francisco Bay.

But the letter told a different story.

And it is here that the strange and unsettling saga of the Terrifying Truth Inside the Letter Sent to the FBI by Three Alcatraz Escapees begins.

The author, writing in shaky but coherent script, identified himself as John Anglin, then 83 years old.

He claimed he had survived the escape along with his brother Clarence and fellow inmate Frank Morris.

According to the letter, the three men had spent years moving through the American South, Mexico, and parts of Central America under false names.

“We split up in 1975,” the letter said.

“Frank died in ’08.

My brother passed in 2011.

” The writer went on to explain he was terminally ill with cancer, living under an assumed identity, and exhausted by decades of hiding.

In a final plea, he offered a deal to the FBI: “If you announce on television that I will receive medical treatment and not serve more than one year in prison, I will turn myself in.”

The letter provided details only an escapee might know—references to cellblock structure, guard rotations, and even the improvised tools the group had used that night.

Investigators were stunned, but the FBI did not publicly reveal the existence of the letter until years later.

Handwriting experts were brought in.

Ink samples were analyzed.

Forensic linguists compared the writing to archived inmate documents.

While the results were inconclusive, the FBI’s official internal assessment, revealed through later public records requests, contained a surprising remark: the letter could not be dismissed as a hoax.

To understand the weight of the claim, it is necessary to revisit the events of the 1962 escape.

Alcatraz, often described as “the Rock,” was built to be escape-proof.

Surrounded by frigid waters, brutal currents, and fog that swallowed everything in sight, the prison seemed impenetrable.

Guards believed the San Francisco Bay was deadlier than any weapon.

The Anglin brothers, skilled at robberies but not violence, had already escaped multiple prisons before being transferred to Alcatraz as punishment.

Frank Morris, the mastermind, possessed an IQ reportedly in the top two percent of the population.

Together, they spent months carving through their cell vents with stolen spoons, building a raft out of stolen raincoats, and creating lifelike dummy heads from soap, concrete dust, and hair collected from the prison barbershop.

On the morning of June 12, 1962, guards discovered the dummy heads in the beds.

The escape became the largest manhunt in California history.

Boats, helicopters, search teams—nothing produced evidence of survival.

The official conclusion from 1979 onward was that the escapees drowned.

But families of the Anglins insisted otherwise.

Over the decades, photos and sightings emerged from Brazil, Mexico, and Georgia.

Some were proven false; others were never fully examined.

The 2013 letter reignited the mystery.

Internal FBI notes reveal the agency debated reopening the case but worried about creating “public instability” around a historical ruling.

SFPD investigators who viewed the letter described the writing as “haunted, tired, and believable.

” One officer recalled a line in the letter that struck him: “I was never free, even when I ran.

” Another said the tone felt less like a criminal bragging and more like a dying man looking for closure.

In 2018, when the letter’s existence became public through a Freedom of Information Act release, it sparked national fascination and reopened questions the FBI had avoided for decades.

Why would a man presumed dead risk exposure? Why wait 51 years? And why did the writer reveal details never released to the public?

As of 2025, the FBI maintains its position: the men “likely drowned,” but the case remains officially open—one of the few unsolved files linked to Alcatraz.

Investigators never found the author, never confirmed the claims, and never located any remains.

Whether the letter came from a ghost of history or a living man desperate to be heard, its arrival shook the legend of Alcatraz to its core.

And it leaves one haunting question behind:

If the escapees really lived… what else about Alcatraz has been kept in the dark?