Dr. Raymond Langston

CSI Level 1: Doctor Raymond "Ray" Langston (Laurence Fishburne) comes into contact with the CSI team in the course of a murder investigation and joins the Las Vegas Crime Lab as a Level-1 CSI. Langston was once a doctor, working in a hospital. A co-worker murdered 27 patients, and all the evidence showed up before him, but he never put the evidence together. His first day on the job, in The Grave Shift, was troubling for him with retrieving a fingerprint (prompting him to over dust and ruin the print), drops a body and accidentally tears its shirt, gets his necktie stuck in the victim's blood, causing it to become evidence, and draws Riley Adams' criticism when he reprimands a man who strikes his son. He also receives a cold welcome from David Hodges, who is still angry about Gil Grissom's departure but warms up to Langston after the latter demonstrates a cornmeal bomb. Nevertheless, the team accepts him as one of their own, inviting him to a diner with them. In Deep Fried and Minty Fresh, it is revealed he knows some Mandarin Chinese. In episode No Way Out he and fellow CSI Riley Adams are held hostage in the aftermath of a shootout in a quiet Las Vegas neighborhood in which Riley was successfully able to disarm the suspect.