Authorities on Monday released the booking photo of the man accused of fatally striking a California Highway Patrol officer during a traffic stop in Riverside County.
Michael Callahan, 36, of Winchester, was booked on suspicion of murder and DUI following the Saturday incident on the 15 Freeway in Lake Elsinore.
The Riverside County Sheriff's Department released his booking photo after CHP conducted a traditional bell-ringing ceremony for Sgt. Steven Licon at the agency's academy in West Sacramento.
CHP Commissioner Warren Stanley announced end-of-watch for Licon as officers stood attention in a plaza where a memorial fountain bears the names of officers killed in the line of duty.
Academy commander James Mann says Licon is the 230th officer to be honored by the fountain.
Callahan is suspected of driving drunk Saturday afternoon when he crossed over the right shoulder of Interstate 15 in Lake Elsinore, crashing into Licon and a car he had pulled over for speeding.
Licon died at a nearby hospital. The family of four in the car he had pulled over weren't hurt.
"Our hearts are heavy after the immeasurable loss of a friend, father, husband, and hero," CHP officials wrote in a statement on Facebook. "Sergeant Steve Licon, #13348, of the CHP Riverside Area made the ultimate sacrifice today while serving his community."
Licon was a 27-year veteran of the agency and is survived by his wife Ann, daughter Marissa and stepdaughter Kelly.
It's unclear if Callahan has an attorney. Inmate records show he has a court appearance set for Wednesday.
Investigators believe the recommendation of a murder charge in the case is "completely appropriate," said Mario Lucio, special services commander of CHP's Inland division.
"We have uncovered evidence which shows gross negligence both during and before this tragic collision," Lucio said at a Sunday news conference.
He declined to explain what the evidence was. Ultimately, prosecutors will decide what charges to file.
Carapia, who knew Licon for six years, said the sergeant was well-liked and known for his work ethic and a distinct and quirky high-pitched laugh.
"He had a great sense of humor," Carapia said. "You could hear him laughing from the sergeant's office. You could hear him coming down the hallway ... Just an all-around great human being."
He said Licon loved his job and the fact that his office was on a motorcycle.
"This is a tough one," he said. "It hits you to the core."
Lucio said Licon used to be his sergeant when he was coming up in the agency and helped shape his career and that of many other younger officers.
"He loved mentoring the troops," Lucio said. "The guy really spent time developing the officers he supervised."
He said the sergeant's death should be a strong reminder to the public that drinking and driving is never acceptable.
"We lost a darned good sergeant," he said. "He's going to be missed."
Police departments and officers across the state took to social media to post about Licon.
CHP Headquarters tweeted that "our hearts are heavy ... Rest easy brother, we have the watch from here."
KTLA's Kristina Bravo contributed to this report.
Correction: A previous version of this story incorrectly stated the fatal crash occurred on the 5 Freeway. It occurred on the 15 Freeway.