Police authorities announced the arrest of a fourth person in the case of the kidnapped teen who escaped from his captors wearing only boxer shorts and a shackle on his ankle.

The fourth person is 29-year-old Anthony Waiters. He was put under arrest on Thursday and faces a number of charges including torture and false imprisonment according to police authorities in Tracy, California (approximately 70 miles east of San Francisco.)

The 16-year-old teen escaped from captivity on December 1 and made it to a nearby gym in Tracy. He was terrified, had a chain locked to his ankle, was covered in what appeared to be cloth and wanted to hide because he thought the kidnappers were after him. The teen showed up at the In-Shape Sports Club in Tracy.

"He said, 'Don't let them get me, don't let them get me,'" gym manager Chuck Ellis said. "He was totally terrified."

The other three persons arrested in this case are Caren Ramirez, 43, Kelly Layne Lau, 30, and her husband, Michael Luther Schumacher, 34. Police officials did not give details about Waiters and how he is connected to the other three or the case.

Police investigators said the teen boy was shackled in the home of Lau, a Girl Scout leader, and Schumacher. The boy was held captive for about a year and was tortured with a bat, knife and belt. The couple used a home about 500 feet from the fitness center to hold the boy captive. The teen apparently jumped over a wall when he escaped and made it onto the gym center’s property.

Lau and Schumacher are the main suspects in this case and are being held at the San Joaquin County jail in lieu of bail of nearly $1.2 million each.