Police offered a $12,000 reward yesterday for information leading to the arrest and conviction of a sexual predator who has struck four times beginning last year.  The suspect is described by police as between 18 and 25 year old, 5-foot-9 to 5-foot-11 and weighing 160 to 180.  His crime wave began at 4:30 p.m. last October 27, when he grabbed a 16 year old girl as she was walking home from a subway station.  He pulled a knife and forced the girl to a nearby rooftop, tied her to a dish antenna and raped and robbed her.  He accosted another 16 year old girl on February 16 when she answered a knock at a door at an apartment on Walton Avenue in Bedford Park.  He forced her at knifepoint to the roof, where he beat and raped her.  He struck again the next day raping a 20 year old woman at knifepoint in her Bedford Park apartment.  He sexually assaulted a 17 year old girl at knifepoint in his latest attack on March 8 in Bedford Park.

(Bronx, New York)