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California Highway Patrol officer Kenyon Youngstrom was killed during a traffic stop in Alamo, Calif., on Tuesday, Sept. 4, 2012. (California Highway Patrol)

MARTINEZ -- A handgun safety certificate, ammunition, a gun-carrying case and three shooting targets are among the items that detectives seized from the home of a Tehama County man suspected of fatally shooting California Highway Patrol officer Kenyon Youngstrom during a Sept. 4 traffic stop on Interstate 680, according to court documents.

Christopher Lacy -- a 36-year-old software engineer who had recently starting working for Mindsource Inc. in Mountain View -- was shot to death by Youngstrom's partner, Officer Tyler Carlton, moments after Lacy shot Youngstrom in the neck, according to search warrant documents filed Monday in Contra Costa Superior Court.

Youngstrom, 37, of Cordelia, was taken off life support the next evening and his organs were donated, saving the lives of four people. His memorial service is scheduled for Thursday morning at a Vacaville church. Carlton is on paid administrative leave, as is protocol after officer-involved shootings.

After long working from home on short software engineering contract jobs, Lacy's neighbors said he recently started working in the Bay Area. Detectives determined that he was employed by the Mountain View company based on an email from a Mindsource recruiter that they found in Lacy's Jeep, according to court documents.


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The commute from Lacy's home near Corning to Mindsource headquarters is about 430 miles round trip, around four hours each way, and would include a long stretch of Interstate 680. Neighbors told investigators that Lacy left his residence at about 5 a.m. on the morning of the shootings, which would align with him being pulled over at about 8:20 a.m. on southbound 680 near Livorna Road in Alamo for an obstructed license plate.

The Mindsource recruiter contacted Tuesday referred calls to his company's human resources department, which did not respond to a voice mail and email.

While searching the Jeep, investigators also found "a back pack containing (mail) belonging to Lacy, pistol ammunition, four loaded pistol magazines, a knit cap, and a pistol shoulder holster," according to the warrant. At his trailer on Stagecoach Road in Rancho Tehema, detectives also seized four computer towers, two laptops, two rack servers, a thumb drive storage device, a tape recorder, paperwork, passports and student ID cards, notebooks, check books, bank receipts, CDs, a day planner, an address book and $1,500 cash.

Married neighbors Jim and Mary Bowron have spent the past week reconciling their fond memories of their loner neighbor to that of the suspected killer of a beloved CHP officer.

"We have found what he did unjustifiable and appalling," Mary said. "This has haunted us all week. It's been a rollercoaster of feelings because, before then, we had known him and liked him."

Lacy "didn't like to be around people so much," Mary Bowron said, but she never saw him struggling with mental illness as his father told media he had been.

Rancho Tehama association rules do not allow shooting guns, and their neighbor, who often spoke to them over his fence, followed rules, they said. The couple said they never even knew he had a firearm.

On one of his many jogs, he noticed a barrel sitting alongside the road, the couple said. Thinking it was dumped, Mary Bowron said he asked her whether she thought he would get in trouble if he took it. He eventually brought it home and left a note with his address just in case, she said.

"By golly, the people wanted the barrel back and called the police on him," Jim Bowron said.

The pair said Lacy despised the Bay Area and left to avoid the hustle and bustle.

"He told me he didn't ever want to go back down there," Jim Bowron said. "But you have to go where the money is, and Silicon Valley just happens to be that."

Mary had seen his Jeep gone the week before the shooting and now wonders whether he was spending the workweek at a motel or somewhere in the Bay Area to avoid a commute.

In the week since the shooting, the isolated rural roads have quieted, aside from curious lookyloos and someone trying to steal Lacy's motorcycle outside his trailer, the couple said. Mary has had trouble shaking the memories.

"It's just very sad."

Contact Matthias Gafni at 925-952-5026 or mgafni@bayareanewsgroup.com. Follow him at Twitter.com/mgafni.