SONOMA COUNTY, Calif. (KTVU) - Sonoma Couny sheriff's investigators say 18-year-old Kirk Kimberly, whose body was found in a shallow grave at Sonoma State University, received multiple stab wounds from his assailant.
Investigators are not releasing how many stab wounds there are, where on the body there are, or the instrument(s) used.
Detectives believe this was not a random act of violence, but an isolated incident.
Sonoma County Sheriff's Department search and rescue volunteers began methodically combing the 10-acre swath of trees and brush on the northern edge of Sonoma State University on Friday.
They were looking for any evidence linked to the killing of 18-year-old Kimberly. His body was found in a shallow grave there Wednesday.
"It's really sad. It is hard to take in," said Danielle Jackson who says she was friends with Kimberly.
She said he loved skateboarding.
"He was really nice and laid back. He was funny. Always telling jokes in class. Made you laugh when you were having a bad day," said Jackson.
At Rancho-Cotati High School, where Kimberly graduated just this past spring, grief counselors have been brought in.
"We have substitutes ready for teachers because for the teachers who had the student, it is going to be a hard day," said Matt Marshall of the Cotati-Rohnert Park Unified School District.
Kimberly was last seen riding his bicycle October 17. Authorities say he may have had a dispute with his parents some time before going missing.
"He was like having some issues, personal issues, but we don't have that solidified," said Sonoma County Sheriff's Department Sgt. Spencer Crum.
Kimberly was not a student at Sonoma State. Investigators won't say if they believe he was killed on campus or placed in a shallow grave here later.
"Kirk has been reported missing since October 17. We are going to have to do some tracing back to that time and the last few days of his life. And what's happened since then," said Crum.
I've been talking to my friends all about it, all night and this morning. We just can't believe it. We want to know what happened to him.
Investigators are asking the public for help. They are urging anyone who may know something about what happened to call them.
Students were surprised by the investigation.