catch him. he's called eastcoastrapist.com. it was launched this week to keep communities on the lookout for this attacker. details are listed along with a plea from police to use a contact on the site with any information to lead to an arrest. clint van zandt is a former fib profiler and an nbc analyst. thanks for your time today. how are you? >> hi, peter. >> police have looked and cleared more than 700 suspects. i had to re-read that figure. more than 700 suspects they've gone through. what's so difficult about trying to catch this guy? >> the challenge is this guy is a sexual predator, peter. this is one who is out like a lion prowling looking for a zebra or gazelle. he's walking the streets and trying to identify a likely victim. he's following the victim home. he's trying perhaps to see if he's going to attack this woman in a house.