Spotlight on Walter Simmons

Walter Simmons is a Crime Scene Investigator who is originally from Louisiana and a fluent French speaker who first appeared in Bolt Action. 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.

Personality of Walter Simmons

Despite being a “newbie”, Walter often has a good relationship with his co-workers in the lab, due to his friendly personality and sense of humor. He especially bonds with Jesse, who later passes away from halon gas. It is not known if Walter is, or has been, involved in any romantic relationships. He does, however, exchange jokes about that with his co-workers whenever they seem to be having dating flings. Walter is generally a pretty laid back guy and is normally cool and kind, but he stands up for himself, even to Horatio’s son, Kyle Harmon. In such times, he will also occasionally have an intense, fiery, angry demeanor. Despite being a “big, strong guy,” he will also get nervous at times when presented with uncomfortable situations. Simmons appears to be a deep thinker, often “connecting the dots” between different pieces of evidence.

Throughout the seasons

Season Eight

Despite his stature, Simmons seems to be easily frightened by large animals and human remains. Hence he is rarely seen in the autopsy room and handles trace evidence instead. As the lowest ranking CSI, Simmons is sometimes given the dirtier and unwanted tasks, such as retrieving a dead man flushed down a toilet and collecting trace from a large pile of rocks. In the episode “Hunting Ground” it is revealed that he speaks French fluently while the episode, “Bad Seed”, reveals that he also a strong knowledge of poisons and toxins which proves helpful to the team. Much like Ryan Wolfe in his debut appearance, Simmons refers to Horatio as “sir” rather than “Lt” or even “H” which Ryan and Eric often call him although he has started referring to Horatio as “H” but still calls him “sir” at times.

Season Ten

He knows and is friends with Samantha Owens from when they both worked the night shift together. They reunite when Samantha is switched over to the day shift.


Simmons generally has a good working relationship with all the team members. His sense of humor has made him a likable personality amongst his more senior colleagues. He was especially close to Jesse Cardoza and often played basketball with him. Ryan took him under his wing, and the duo has a friendly relationship, though Wolfe occasionally enjoys “pulling the seniority card” and leaves Simmons with the undesirable tasks. Initially, he was distrustful of veteran CSI Eric Delko when Delko was conducting undercover investigations but has since had a mutual respect for him after Delko exonerates Wolfe.

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