CBS 58 MILWAUKEE (CBS 58) -- David Boyd, 65, was sentenced Thursday, July 16, to life in prison after being convicted on five felony charges connected to the repeated sexual assault of two young girls over several years, according to prosecutors. Diagram of basement holding area, drawn by one of the victims Boyd was convicted of two counts of repeated sexual assault of the same child, along with child abuse, trafficking of a child and false imprisonment. Basement where victims were chained Prosecutors say the assaults began when one victim was five years old and the other was eight, and that Boyd physically abused the girls when they resisted and confined them in his basement. He would repeatedly threaten to kill one of the girls, using a knife to cut her body. Authorities learned of the abuse earlier this year after one of the girls disclosed it to her foster parents, according to prosecutors. #cbs58 #crimewatchmilwaukee