FILE – This file photo provided by the Baltimore Police Department on Friday, May 1, 2015 shows William G. Porter, one of six police officers charged with felonies ranging from assault to murder in the death of Freddie Gray. Porter took the stand Wednesday, Dec. 9, 2015 in his own defense. If convicted on all charges, the maximum penalty he faces is about 25 years. (Baltimore Police Department via AP, FILE)