Alcatraz Island later invalidated the sale and paid Frémont nothing. Frémont and his heirs sued for compensation during protracted but unsuccessful legal battles that extended into the 1890s. Following the acquisition of California by the United States as a result of the Treaty of Guadalupe Hidalgo (1848) which ended the Mexican–American War, and the onset of the California Gold Rush the following year, the U.S. Army began studying the suitability of Alcatraz Island for the positioning of coastal batteries to protect the approaches to San Francisco Bay. In 1853, under the direction of Zealous B. Tower, the United States Army Corps of
Experiment Alcatraz Experiment Alcatraz Experiment Alcatraz is a 1950 American crime film directed by Edward L. Cahn and written by Orville H. Hampton. The film stars John Howard, Joan Dixon, Walter Kingsford and Robert Shayne. The film was released on November 21, 1950, by RKO Pictures. A number of Alcatraz prisoners have volunteered to take an experimental serum that could cure a fatal blood disease, promised a parole if they take part. During the experiments, notorious racketeer Barry Morgan steals one of lieutenant nurse Joan McKenna's scissors and stabs convict Eddie Ganz to death, then escapes. The medical tests are abandoned, the