A sticky-fingered Pennsylvania cop causes a DA to drop some drug cases, a pill-pushing Massachusetts cop resigns, and an unnamed New Mexico narc is under investigation for undeclared misdeeds. Let's get to it:

In Erie, Pennsylvania, an Erie police officer's theft of cocaine from the evidence locker has led to the dismissal of cocaine trafficking charges against four men. Erie County DA Brad Foulk dropped the charges April 3 after a police inspector testified that Lt. Robert Leibel had admitted stealing 28.5 grams of cocaine that was evidence in the case in November. Foulk said the charges should be dropped because the theft broke the chain of custody of the evidence in the case. Liebel, 46, has not been charged in the November theft, but is awaiting an April 29 preliminary hearing on charges he stole another 12 grams of cocaine on February 10. The disappearance of the cocaine in November led to the investigation that resulted in Liebel's arrest in the February case.

In Swampscott, Massachusetts, a Swampscott police officer facing federal drug charges has resigned. Officer Thomas Wrenn, 37, resigned Saturday, thwarting any disciplinary action by the town and leaving him entitled to resignation benefits, including pay for unused vacation and personal time. Wrenn had been placed on leave last month after he was arrested on federal charges he possessed oxycodone with the intent to distribute. Wrenn was busted after buying 50 Percocet pills from a snitch. He subsequently admitted to providing pills to five other people, including a former Nahant cop and four young women. If convicted, he faces up to 20 years in prison.

In Albuquerque, a Bernalillo County Sheriff's Department narcotics officer is on paid leave while the department investigates claims of misconduct. Neither the officer's name nor the specifics of the misconduct have yet been revealed. The investigation began April 4.