A former campus security officer at Lakewood High School was arrested and charged with sexually assaulting a student, police said Wednesday. On Aug. 13, a former Lakewood High School student told police she was sexually assaulted by a school employee about 10 years ago, the police department said in a Wednesday statement. The woman told investigators that in her junior and senior years of high school, Rubel “Tim” Martinez — a campus security officer with Jefferson County R1 School Security — repeatedly assaulted her on and off school grounds, police said. Martinez worked as a campus security officer at Jefferson Junior and Senior High Schools and at Lakewood High School from 2006 to 2022, according to the police department.