. >> delaware district attorney jack walen says the motive is unclear and they suspect it may just have been a crime of opportunity as gibson was walking home from a bar to a friend's house on bailey street. the killer was cut and left a trail of blood and police found the suspected murder weapon in a storm drain and gibson's mother says her daughter was a loving mother who did not deserve to die. the developments are bitter sweet. >> it's been rough. it's been rough. but i'm so happy right now. like -- >> sources say that philadelphia police suspect allen is responsible for a half dozen other violence attacks in the kensington area, including the rape and murder of rickry morgan. and that allen has a long criminal history and spent much of the past 18 years behind bars for attempted murder, carjacking and other offenses. >> i thank god he is off the street and can't do this to anyone else. this was horrific. >> sources tell me the suspect was picked up in october on a patrol violation and he was living with his girlfriend in philadelphia and i am told she is not cooperating. >> thank y

. >> delaware district attorney jack walen says the motive is unclear and they suspect it may just haveibson was walking home from a bar to a friend's house on bailey street. the killer was cut and left a trail of blood and police found the suspected murder weapon in a storm drain and gibson's mother says her daughter was a loving moth