CHRIS CUOMO REPORTS FROM "PILL CITY," A BORDER TOWN WITH A BUSTLING MARKET FOR STEROIDS AND PRESCRIPTION DRUGS, ON "PRIMETIME LIVE," MARCH 31 ON ABC

Also: A Woman Takes Matters into Her Own Hands to Catch a Stalker And: White Off-Duty Cops Accused of Brutally Beating a Mixed-Race Man

The border town of Nogales, Mexico has come to be known as "Pill City," a bustling market for all sorts of drugs, from prescription pain killers and anti-depressants to Oyxcontin. American senior citizens travel to Nogales to save big money on their expensive prescription pills, and now young people are flocking there too to get their hands on steroids and other drugs they would not be able to obtain legally in the U.S. In a "Primetime Live" hidden camera investigation, Chris Cuomo reports that these drugs are as easy to buy as aspirin in local pharmacies, either with easily obtained Mexican prescriptions or even -- at some pharmacies -- with no prescription at all for the right price. "Primetime Live" airs THURSDAY, MARCH 31 (10:00-11:00 p.m., ET) on ABC.

Also: Hannah Arbuckle's peaceful life in a quiet Indianapolis neighborhood turned into a nightmare when a man brazenly began to photograph and videotape her through her windows. As this invasion of her privacy continued for months, she feared where this Peeping Tom's obsession might lead. Frustratingly, police were never able to catch him in the act. But eventually Arbuckle would come face to face with her tormentor. She talks with Cynthia McFadden about why she made the risky decision to take matters into her own hands.

And: For two young Milwaukee women, a night that started in celebration at a bachelorette bash for a friend would turn into a violent evening they will never forget. It happened after the party was over, when they moved on to another party at the home of an off-duty police officer. The women - both white -- were accompanied by two men from the earlier party. Both of them were African-American and one of them, Frank Jude, was an entertainer at the bachelorette event -- a male stripper. They tell John Quiqones they knew the minute they walked through the door of the party that it was the wrong place to be.

As the four departed, some of the off-duty cops accused them of stealing a police badge and pulled the two men from the car of the one of the young women. The cops allegedly surrounded Jude and beat him furiously and continuously, even after he was on the ground. The incident is documented on 911 recordings of cell phone calls the women made. But, according to the tapes and interviews with Jude and the women, the beating didn't stop even after on-duty police responded and placed Jude in handcuffs. No charges were filed in the case against the cops for more than three months, until the story became front page news and the district attorney accused police of "obstructing" his investigation.

Diane Sawyer, Chris Cuomo, Cynthia McFadden and John Quiqones are the anchors of "Primetime Live." David Sloan is the executive producer.