The San Luis Obispo Police Department has identified an Arroyo Grande man as the sole person of interest in the death of Kristen Marti.
Police say Robert Koehler, 36, owns a local mobile mechanic service that operates in southern San Luis Obispo County and northern Santa Barbara County.
Lt. John Bledsoe said the department will not release any additional information on Koehler or his whereabouts at this time.
"We want the public to come to us on this one," he said.
Investigators are asking anyone who may have interacted with Koehler during the week of Jan. 9, 2018, to call Det. Caleb Kemp at 805-783-7765.
Earlier in April, police released a photo of the mid-90s, red Chevy S-10 Blazer that was identified as a vehicle of interest in the case.
Marti, whose body was discovered in late March in Prefumo Canyon, was last seen Jan. 9 sitting with a man in a parked car in the 1800 block of Prefumo Canyon Road, police say.
At the time her body was discovered, police said they were investigating the case as a homicide "based on the circumstances surrounding this investigation."
According to a Facebook profile in her name, Marti attended Morro Bay High School and lived in San Luis Obispo.