The fbi joins forces with the nypd in the search for a killer, searching from the sky and the ground looking to solve a murder mystery. A public plea from police tonight two days after a young queens home. Investigators are concerned the suspect could strike again. Reporter this investigation is far from over. And police now believe it may have been a crime of opportunity, likely committed by someone the victim didnt know. Police are interviewing local sex offenders and day lashers who frequent the neighborhood. Work the investigation into who murdered this woman. Police calling the suspect a public threat. We believe theres a Severe Community threat. We think its random. We dont believe its anybody in her life. Reporter with anyone known to the victim ruled out, police say they need the publics help. Few and weak tips have called in. Theyre not very informative and theyre all anonymous. Reporter the desperation for information has led to 10,000. Her body was found facedown, teeth brok