During a regular police investigation he becomes involved with a detective and begins to develop feelings for her, which beyond basic desires are unusual for a Thirteen. Eventually, the detective is herself murdered by a slow-acting toxin, and Marsalis decides to track down her killer himself.
As part of his daily police duties, he develops a connection with a detective and starts to feel romantic feelings towards her, which are unusual for someone of his age. The detective's murder by a slow-acting poison sparks Marsalis into taking personal action to track down the killer.