The startling new theory emerged as it was revealed the last man to see suspected victim Shannan Gilbert believes the prostitute is still alive.
Officers in Long Island where four bodies of of vice girls have been dug up, are convinced the killer could be in law enforcement because:
- He used disposable and untraceable cell phones to contact the four victims - all in their twenties - who advertised their services on Craigslist.
- When he made six taunting calls to the sister of victim Melissa Barthelemy they lasted under three minutes each thwarting officers racing to find his exact location.
The calls were made in New York City, including Times Square and Madison Garden, allowing him to blend in with the crowds unseen, ensuring if his cell was pinpointed surveillance cameras would not be able to pick him out.
Some investigators now believe the killer's behaviour points to a man who has a deep knowledge of how police investigate serious crimes.
One told the New York Times: 'He is a guy aware of how we utilise technology. Frankly, people are thinking maybe he could be a cop - either one still in law enforcement or one who has moved on.
'Without question this guy is smart, this guy is not a dope. it's a guy who thinks about things.'
Ms Barthelemy's body was found in deep undergrowth along Ocean parkway near Gligo Beach last December along with three others. All were covered in burlap. She had been missing for nearly two years. Read More