What is the name of the Ice Truck Killer in season 1?

The Ice Truck Killer in season 1 is Brian Moser. He operates under the alias Rudy Cooper, presenting himself as a prosthetics specialist and becoming romantically involved with Debra Morgan.

Brian is Dexter Morgan’s biological older brother. As children, both brothers witnessed their mother Laura Moser’s murder and were left for two days in a shipping container with her body. Harry Morgan rescued Dexter and raised him, while Brian was sent to a mental institution, separating the brothers for years.

Brian recreates details connected to their childhood trauma through his murders, hoping to awaken Dexter’s buried memories. Dexter eventually realizes that Rudy Cooper is the Ice Truck Killer and learns Brian’s true identity. Brian wants Dexter to kill Debra so they can remain together as brothers, but Dexter refuses and kills him instead.

A common mix-up is Rudy Cooper, the killer’s assumed identity, or the name Brian Moser, his real identity. James Doakes is suspicious of Dexter during the case, but he is not the Ice Truck Killer.