IT STARTED OUT as an everyday drug sting.
An undercover DEA agent had infiltrated a network of heroin dealers on the hardscrabble streets of North Philadelphia.
His investigation soon took a stunning turn.
Suddenly, he wasn't just taking down drug peddlers. He was negotiating with three men in blue.
The three baby-faced Philly cops thought that the undercover agent was a drug dealer and money launderer. The greedy cops allegedly helped steal 300 grams of heroin, with a street value of more than $100,000, and gave it to an undercover agent to sell.Yesterday, the three cops - Mark Williams, 26, and James Venziale, 31, of the 39th District, and Robert Snyder, 29, of the 25th District - were arrested in connection with a joint federal-local probe that unfolded like an episode of the FX police-corruption series, The Shield.