As police try to unravel the case of a suspected serial killer in Long Island, they've found their work hampered by the killer's unusual savviness. The killer seems so well-versed in police techniques that some are wondering if he or she is in law enforcement.

Eight bodies have been discovered off Ocean Parkway near Gilgo Beach in Long Island. The four women already identified are prostitutes, one of whom is 24-year-old Melissa Barthelemy. After Barthelemy disappeared, a man who is believed to be her killer called her sister a number of times and taunted her. But police say he made the calls in New York's most crowded places to avoid video surveillance, and kept the short to hinder any tracing. The killer also used disposable cellphones to hire his victims on Craigslist.

One person involved in the investigation told the New York Times "He is a a guy who is aware of how we utilize technology... Frankly, people are thinking maybe he could be a cop." Meanwhile, the New York Post reports that a 48-year-old drifter was partying with missing Craigslist sex worker Shannon Gilbert the night she went missing near Gilgo Beach in May of last year. The search for Gilbert was what initially led police to discover the bodies, but Gilbert has yet to be found. [NYT, NYP, Image via Getty]