A 21-year-old Morgan Hill man who was to be charged with the murder of missing teenager Sierra LaMar was expected to appear in court on Thursday afternoon, according to the Santa Clara County District Attorney's Office.

Antolin Garcia-Torres, who was arrested Monday evening on suspicion of murder and kidnapping, was being held without bail at the Santa

Clara County Main Jail on Wednesday. His arraignment was initially planned for Wednesday morning but was delayed, and he was scheduled to be arraigned at 1:30 p.m. Thursday.

Sierra, a 15-year-old student at Sobrato High School in Morgan Hill, was last seen the morning of March 16.

Santa Clara County Sheriff Laurie Smith said at a news conference Tuesday morning that investigators believe Sierra was murdered by Garcia-Torres after being abducted by him. She said it did not appear the two knew each other.

A sheriff's dive team resumed its search of local reservoirs and waterways Wednesday, focusing on the Uvas Reservoir that morning.

Volunteer searchers are scouring the area around the reservoir, Klaas Kids Foundation volunteer coordinator Teresa Casillas said.

Earlier this month, the sheriff's office seized a red Volkswagen Jetta that investigators now say belongs to Garcia-Torres.

Garcia-Torres has been under 24-hour surveillance since March 28, when the sheriff's office linked him to the Sierra LaMar case through DNA evidence left on articles of clothing in Sierra's discarded purse, which was found about 2 miles from her house days after her disappearance.

Smith said no blood was found in the car or on her clothing, and investigators did not have a murder weapon or a motive as of Wednesday.

Tom DiVittorio, the owner of Maple Leaf RV Park at 15200 Monterey Road in Morgan Hill, said Wednesday morning that Garcia-Torres lived there with his mother and sister.

DiVittorio said the mother had lived there about two years, but said she is now looking to move. He said he had never had any problems with the family.

A woman in the bakery department at a Safeway store at 100 Tennant Ave. in Morgan Hill said Garcia-Torres had worked at the grocery store, but not for some time.

An assistant manager at Famous Dave's BBQ in Gilroy said

Garcia-Torres' sister Lucero Garcia works at the restaurant and also holds another job. He characterized her as a hard worker.

He said Lucero Garcia's coworkers are all praying for her, adding, "She is the sweetest thing."

The manager said he had never met her brother, Garcia-Torres.