| Main Character: Miami | |
 | |
| Name | Walter Simmons |
| Gender | Male |
| Family | Unnamed Mother |
| City | Miami |
| Job | CSI |
| Rank | Level 1 |
| Specialty | Art theft, toxins |
| Status | Alive |
| Portrayed By | Omar Benson Miller |
| First Appearance | Bolt Action |
Walter Simmons is a Crime Scene Investigator who is originally from Louisiana and a fluent French speaker.
He was originally part of the night shift of the Miami-Dade Crime Lab but transferred to Horatio Caine's day shift team in season 8.
He is an art theft specialist who was promoted to the main cast after three episodes and is currently a CSI Level 1.