BROOKLYN - Amid the recent rash of sexual attacks, News 12 Brooklyn reached out to a behavioral and forensic psychologist to shed some light on what goes on inside the mind of a sexual predator. "Typically, there is a compulsive dimension to this behavior," said Dr. N.G. Berrill. "There isn't an on or off switch that can be pushed. They think about the target population, they fantasize about the target population." Police say they may be looking for more than one predator in the string of attacks.