The search for a Monrovia woman believed to have been kidnapped by her boyfriend shifted toward the forest after someone saw the car he used heading toward Mt. Baldy, authorities said.

While the boyfriend, 27-year-old Robert Anthony Camou, remains in custody for an April 22 burglary and domestic violence case, Amanda Custer was still missing. Sheriff’s detectives on Wednesday asked the community in and around Mt. Baldy to remain vigilant in looking for the 31-year-old woman.

Camou had been ordered to wear an electronic-monitoring device and to stay away from his girlfriend, identified in court records as “Amanda C.”, because of an April 22 domestic case against him, according to court records and authorities.

Camou wasn’t wearing the electronic device when arrested Tuesday, Monrovia Police Lt. Jaime Alfaro said. He said the victim in the April 22 case is the missing woman.

Monrovia police went to Camou’s home on the 600 block of Vaquero Road regarding possible domestic violence on Monday at 8:15 a.m. They found blood, Sheriff’s Lt. Scott Hoglund said, adding that Camou was seen putting Custer in the rear hatch area of a gray 2017 Toyota Prius.

The car was then seen around 9 a.m. in Claremont travelling north on Padua Avenue toward Mt. Baldy, according to Sheriff’s spokeswoman Deputy Juanita Navarro-Suarez.

“Although the extent of Custer’s injuries are unknown, homicide detectives believe she may be in grave danger,” she said.

Navarro-Suarez said detectives are also aware of a video that showed Camou rapping at a bar. She asked anyone who was present during the recording or saw Camou on Monday and early Tuesday to call the Sheriff’s Homicide Bureau.

KTLA first reported about the video where Camou rapped about killing his “b….” and burying her in the dirt. The station said Camou had been in a bar in downtown Los Angeles on Monday night.

He was arrested in Los Angeles on Tuesday after a five-hour standoff, with him barricaded in the Prius until a Los Angeles police SWAT team fired tear gas into the car, forcing Camou out.

Detectives arrested Camou on a bench warrant for violating his electronic monitoring.

Camou was scheduled to appear in Pasadena court Wednesday on the burglary and domestic violence case. It was continued to Thursday for a hearing, said Paul Eakins, a spokesman for the Los Angeles County District Attorney’s Office.

Camou is accused of assaulting his girlfriend on April 22 in Pasadena. Pasadena police declined to elaborate on the incident except to say it occurred at a residence on the 3000 block of Greenhills Road.

“The victim sought help at a nearby residence, and the defendant is alleged to have chased her into the house and attacked an elderly man who attempted to intervene,” Eakins said.

Camou pleaded not guilty on June 20 to first-degree burglary, injuring a girlfriend, assault by means of force likely to produce great bodily injury and a misdemeanor count of battery, Eakins said.

“At the arraignment, our office requested that bail be set at $150,000, but over the prosecutor’s objections, the court released the defendant on electronic monitoring,” he said. “The prosecutor requested a protective order, which the court issued.”

The court issued a bench warrant for Camou on Monday afternoon for violating his electronic monitoring.

Monrovia police notified the probation department that they were looking for Camou, Lt. Alfaro said. The probation department received warnings indicating the battery was low for Camou’s monitoring device and as of Monday morning the battery for the device had not been charged, according to Alfaro.

Eakins said the court received a notice that Camou absconded from the probation department electronic monitoring program and the court also received an email from Monrovia police.

Anyone who was in the Mt. Baldy area or around Mt. Baldy Road, Glendora Ridge Road or Glendora Mountain Road on Monday between 9 a.m. and 3:30 p.m. and saw Camou, Custer and/or the Prius is asked to call the Sheriff’s Homicide Bureau at 323-890-5500. Anonymous tips can be submitted to Crime Stoppers at 800-222-TIPS or at lacrimestoppers.org.