Published: Mar 22, 2014 8:06 PM EDT
Updated: Mar 22, 2014 10:19 PM EDT

NAPLES, Fla. - After thieves broke into his car in a gated community, Dwayne Broomfield decided to take matters into his own hands.

"It's a violation," said Broomfield. "They got into my personal space."

The Naples business owner and former Marine said he noticed Monday his watch and briefcase were missing. By Friday, he had come up with a plan to get them back.

"I went onto Craigslist... The cartier watch is there," Broomfield said. "He stole it on the 17th, and it's listed on the 18th. He's trying to sell it for $2,000."

That's when he decided to organize an undercover operation of his own, enlisting a friend's help.

"I had (him) make the phone call like he's a watch collector, and he wants to see the watch," Broomfield said.

He told detectives he planned to have his friend meet the watch seller at a local restaurant. Broomfield spied from a distance as teenager showed up in a car with 2 others.

"I watched them. (My friend) takes pictures of the watch. I said, 'That's my watch.' It had a little nick on the bezel."

Broomfield's friend told the man he had to think about purchase and left, giving Broomfield time to follow the seller's truck, get a license plate and call detectives.

"I tell the detectives, 'Let's do something. Let's get these guys tonight.'"

After arranging to meet again to make the sale, 19-year-old James Goodell found himself in a trap and in cuffs.

For Broomfield, it wasn't as much about getting back his watch as it was about getting back his peace of mind.

"Now we got him on grand theft. We got him on all kinds of stuff," Broomfield said. "I empower myself and now I can open my windows again and sleep."