Friends of missing Cal Poly SLO student try to find UCLA students last seen with student

Friends of a Cal Poly San Luis Obispo student who went missing Sunday are trying to find a group of UCLA students who were reportedly last seen with the student.
Brett Michael Olson, a 20-year-old from Lafayette, Calif., was last seen Sunday afternoon at an area known as Beer Can Beach while participating in a Labor Day float down the Sacramento River in Hamilton City, said Rich Warren, the Glenn County undersheriff.