Here is the article about the worker whose leg was crushed while he was locked in at WalMart at night. The article is from the New York Times, but I can't get the whole thing because it is now archived, and I would have to buy it. Note the capitalized words -- I added the caps, but the words are original to the article.

Workers Assail Night Lock-Ins by Wal-Mart

Looking back to that night, Michael Rodriguez still has trouble believing the situation he faced when he was stocking shelves on the overnight shift at the Sam's Club in Corpus Christi, Tex.

It was 3 a.m., Mr. Rodriguez recalled, some heavy machinery had just smashed into his ankle, and he had no idea how he would get to the hospital.

The Sam's Club, a Wal-Mart subsidiary, had locked its overnight workers in, AS IT ALWAYS DID, to keep robbers out and, as some managers say, to prevent employee theft. AS USUAL, there was no manager with a key to let Mr. Rodriguez out. The fire exit, he said, was hardly an option — management had drummed into the overnight workers that if they ever used that exit for anything but a fire, they would lose their jobs.

"My ankle was crushed," Mr. Rodriguez said, explaining he had been struck by an electronic cart driven by an employee moving stacks of merchandise. "I was yelling and running around like a hurt dog that had been hit by a car. Another worker made some phone calls to reach a manager, and it took an hour for someone to get there and unlock the door."