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Detectives investigate the fatal shooting Monday at the Helen Vine Recovery Center in San Rafael. The dead employee was identified Tuesday as Nathan Lamont Hill, 52, of Vallejo. (Alan Dep/Marin Independent Journal)
Detectives investigate the fatal shooting Monday at the Helen Vine Recovery Center in San Rafael. The dead employee was identified Tuesday as Nathan Lamont Hill, 52, of Vallejo. (Alan Dep/Marin Independent Journal)
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The suspect in a deadly gun rampage in San Rafael was arraigned on unrelated charges in Sonoma County while the Marin homicide investigation continued Tuesday.

Davance Lamar Reed was arrested on Monday after a pursuit in Sonoma County. He is the suspect in a fatal shooting that day at the Helen Vine Recovery Center in San Rafael. (Sonoma County Jail photo)

Davance Lamar Reed, 37, is suspected of shooting three people early Monday at the Helen Vine Recovery Center, a detox clinic near Smith Ranch Road.

The attack killed a detox staffer and critically wounded two other people. The slain employee was Nathan Lamont Hill, 52, of Vallejo, the Marin coroner’s office reported Tuesday.

The other victims were critically injured but survived. One is Anthony Dominguez Mansapit, 32, another employee at the detox center. The other is Brittany Kehaulani McCann, 30, of Marin City.

McCann is a girlfriend of Reed, whom authorities described as a transient with links to Marin City and Vallejo. The motive for the shooting remained under investigation Tuesday, but authorities know that McCann and Reed went to the detox center together.

McCann and Reed were allowed into the center, which has a 6-foot-tall metal fence running along the front of the property and barbed fences on the other sides. A touchpad allows arrivals to contact staffers inside, and entry is gained through an electronic gate at the driveway.

The shooting happened at about 1:30 a.m. Monday. A patient at the clinic called authorities to report hearing gunshots and screams for help, according to sheriff’s department logs.

The patient found the three victims in the blood-spattered office and reported that one was face down in a pool of blood, apparently dead.

Sheriff’s deputies and police searched the detox center, the former Helen Vine complex down the road and the rest of the area. There was no sign of the gunman.

Medics rushed Mansapit and McCann to the intensive care unit at Marin General Hospital. Jamie Maites, the hospital’s vice president for communication, did not respond to an inquiry Tuesday about their conditions.

About two hours after the shooting, a Sonoma County deputy spotted a vehicle driving erratically on northbound Highway 101 on the Cotati Grade. The vehicle, a blue Hyundai, had no rear license plate and an inoperable taillight, and it was weaving between lanes at varying speeds, said Sonoma County sheriff’s Sgt. Spencer Crum.

The deputy tried to stop the car, but the driver made a run for it. The ensuing pursuit, which reached speeds of about 110 mph, ended when police placed a spike strip on the highway in the Rohnert Park area and punctured two tires, Crum said.

The driver, Reed, surrendered and was booked into the Sonoma County Jail on suspicion of reckless evasion and other offenses.

The vehicle was registered to a residence in Brentwood, Contra Costa County. Police learned the vehicle belonged to a woman who had recently given it to her son, a San Rafael resident.

The son is Anthony Mansapit, the Helen Vine detox employee who survived the shooting. The investigation determined that Reed apparently left the shooting scene in Mansapit’s car.

When Marin sheriff’s investigators became aware of Reed’s arrest later in the day, detectives went to Santa Rosa to interview him. He made “admissions” that linked him to the crime scene in San Rafael, the sheriff’s department reported.

Reed was arraigned in Santa Rosa on Tuesday on charges of reckless evasion, driving with a suspended license and possession of cannabis, said Stephanie Smith, a spokeswoman for the Sonoma County District Attorney’s Office. She said Reed’s next court date is set for Nov. 15, and a transfer to Marin County Jail might be discussed then.

The Marin County District Attorney’s Office had not filed any charges against Reed as of Tuesday night. Investigators have not recovered the gun used in the shooting.

Reed — also known as Davon Lamar Johnson — has a history of drug crimes, weapons offenses and probation compliance failures in Northern California, according to federal court documents.