Police released surveillance video of the suspect taken minutes before he attacked a 66-year-old woman on November 24th in the area of 1800 block of South 24th Street.
Police say the thief followed the woman for a few minutes then knocked her unconscious from behind.
He stole her purse containing her identification, $20 and a bible.
Investigators say the man has struck a handful of times between November 7th and December 2nd.
Anyone with information is asked to contact Philadelphia Police.