Miran Edgar Thompson (December 16, 1917 – December 3, 1948) was an inmate of Alcatraz whose participation in an attempted escape on May 2, 1946 led to his execution in the gas chamber of San Quentin. At the time of the Battle of Alcatraz, Thompson was serving life plus 99 years for kidnapping, and for the murder of Amarillo, Texas police officer Detective Lemuel Dodd Savage. Thompson had a record of eight escapes from custody by the time he was transferred to Alcatraz in October 1945.
Detective Savage was shot and killed while transporting Thompson and Elber Day to jail. Savage had arrested the two when he found them burglarizing a store. He searched the two suspects before transporting, but missed a handgun hidden in Thompson's pants. During the transport, Thompson produced the gun and shot Savage. As Thompson fled, he kidnapped three other people before being apprehended.
Detective Savage was survived by his wife, a son and two daughters.
Thompson was convicted of federal kidnapping charges and sent to Alcatraz Prison. While in Alcatraz, Thompson was part of an escape attempt that ultimately left Correctional Officer Harold Stites and Correctional Officer William Miller, of the Federal Bureau of Prisons, dead from gunshot wounds.
On May 2, 1946, Thompson, with five other inmates, participated in the unsuccessful attempt to escape Alcatraz by seizing the prison's gun gallery and then the prison launch to San Francisco. Although initially successful, the convicts failed to open the yard door and the failed escape turned into a bloody struggle that lasted almost two days before prison authorities regained control. Thompson survived the fighting, which left two corrections officers dead and thirteen wounded, and three convicts dead. Thompson was tried for his part in the violence, specifically accused of inciting Joe Cretzer to open fire on nine hostage guards in an effort to eliminate witnesses.
Thompson was found guilty along with inmate Sam Shockley, and they were both executed in the gas chamber of San Quentin on December 3, 1948.