Actor Don Johnson, who portrays the hard-nosed but flashily dressed "Miami Vice" undercover cop, has apprehended a suspect in real life.

He nabbed an intruder in a Los Angeles hotel room as the man rifled through the purse of his fiancee, actress Melanie Griffith, police said Monday.Johnson, 39, discovered the intruder when he and Griffith opened the door to their room at the Hotel Bel-Air on Sunday night, said police Capt. Clayton Mayes. The purse contained expensive jewelry, but the couple surprised the man before anything was taken, Mayes said.

"Don Johnson took the suspect into custody and held him until hotel security officers could detain him until police arrived," Mayes said.

Arrested and booked for investigation of attempted burglary was David Johnson, 34, no relation to the actor, Mayes said.