How three men escaped Alcatraz and disappeared

An escape with an unknown ending

The escape still has two very different levels of certainty. The men got out of their cells and off the prison's main building. Investigators pieced together how they reached the island's shoreline. Their eventual fate, however, was never established. The FBI considered drowning the likely outcome; that conclusion did not settle where the three men ended up. [1] [3]

Months of preparation

The FBI's reconstruction places the start of planning in December 1961. Morris and the Anglin brothers were joined by a fourth prisoner, Allen West. They worked on the ventilation openings at the backs of their cells, using improvised tools that included a drill powered by a broken vacuum-cleaner motor. Covers concealed the growing openings. [1]

Beyond the cell walls was an unguarded utility corridor. From there, the group reached a concealed space above the cell block and used it as a workshop. They gathered more than 50 raincoats to make flotation gear and a raft measuring roughly six by 14 feet. The FBI describes stitched seams sealed with heat from the prison's steam pipes, wooden paddles, and a musical instrument repurposed to inflate the raft. [1]

The dummy heads served a separate purpose: delaying discovery. The photograph of Clarence Anglin's bed shows how a head could be placed beneath the bedding to create the appearance of a sleeping inmate. According to the FBI, the decoys apparently fooled the night guards. [1]

One man left behind

On the evening of June 11, West could not remove his ventilation grille in time. Morris and the Anglin brothers continued without him. According to the FBI's reconstruction, they collected their equipment, climbed through a ventilator onto the roof, descended a bakery smokestack, crossed a fence and reached the northeast shore. West later helped investigators reconstruct the plan. [1]

The reported route across the bay was to Angel Island, followed by another crossing toward Marin County. That was the intended journey. No verified record establishes that the three completed it, so a map of the plan cannot be read as a track of their movements. [1]

Evidence without an ending

Searchers recovered items that investigators linked to the attempt, including letters sealed in rubber and a homemade life vest found on Cronkhite Beach. The FBI also describes a paddle recovered on Angel Island resembling one found at the prison. These discoveries supplied clues without proving that the men survived the crossing. The National Park Service's account says their bodies were never recovered. [1] [3]

The FBI cited the bay's cold water and strong currents, the absence of the clothing and car thefts the escape plan anticipated, and the lack of credible evidence that the men remained alive during its investigation. It closed its case on December 31, 1979, and transferred responsibility to the U.S. Marshals Service. [1]

The escape's ingenuity is documented. Its ending is not. The evidence supports an extraordinary departure from Alcatraz, followed by a gap that speculation has never conclusively filled. [1] [3]