During a 13-year period, Dahmer, who lived primarily in the Midwest, murdered at least 17 men. Most of these men were young, gay African Americans who Dahmer lured back to his home, promising to pay them money to pose nude for photographs. Dahmer would then drug and strangle them to death, generally mutilating, and occasionally cannibalizing, their bodies. Dahmer was finally arrested on July 22, 1991, and entered a plea of guilty but insane in 15 of the 17 murders he confessed to committing. In February 1992, the jury found him sane in each murder, and he was sentenced to 15 consecutive life sentences. Two years later, Dahmer was killed at the age of 34 by fellow inmate Christopher Scarver, who also fatally beat the third man on their work detail, inmate Jesse Anderson. Scarver's motive in killing the two men is not entirely clear; however, in his subsequent criminal trial he maintained that God told him to kill Dahmer and the other inmate. Scarver, already serving a life term for murder, was sentenced to additional life terms and transferred to a federal prison.