A 16-year-old boy who appeared unexpectedly without his pants in a Windsor teen's bedroom Monday morning is in custody, suspected of burglary and attempted sexual assault, Windsor police say.

The 17-year-old girl was awakened by a noise and found an unfamiliar male in her room, said Windsor Sgt. Mark Essick.

"She was asleep in bed when he entered. She heard a noise ... and she sees this young man, partially clothed, next to her bed," Essick said.

She screamed and yelled and he ran from the house, Essick said. The girl called 911 at 8:54 a.m., reporting the incident and saying the intruder had been wearing only a camouflage-pattern T-shirt.

The first sheriff's deputy was at the Anna Drive house within three minutes, according to dispatch logs. A neighbor who had seen a young man running from the area told deputies that he'd headed south toward Old Redwood Highway and that he had been wearing jeans and a camouflaged T-shirt.

Deputies, who serve as police in the city of Windsor, found a youth matching the description and stopped him at gunpoint nearby on Old Redwood Highway.

The victim identified him as the person in her room and he was arrested on suspicion of the two felonies.

Further investigation at the girl's home found a screen and a window to a utility room had been tampered with and partially removed. Because he was in the girl's bedroom and was only partially clothed, police believe he intended to commit a sexual assault, Essick said.

They also found items in her room that appeared to be connected to the suspect.

"We believe he left some of his clothing in this girl's bedroom," Essick said.

Monday was school holiday. The girl's mother had left for work and she was home alone, sleeping in on her day off.

The suspect had been placed in a group home in Philo, under the authority of Alameda County, just last week, Essick said, but he'd left the Mendocino County home without leave and had been missing for a few days.

You can reach Staff Writer Randi Rossmann at 521-5412 or randi.rossmann@pressdemocrat.com.