This is book number 4 in the Fearless FBI series.
An agent's work is never done. Hot-shot recruit Gaia Moore has just managed to close one case--and find her way back into the FBI's good graces--when the Lollipop Murderer strikes again. Every minute that passes with the killer on the loose puts more innocent women in danger. Gaia and Kim are closing in on the killer. But when all leads point to the same suspect, Gaia is thrown off balance--and into conflict with her partner. Because Kim's theories incriminate the one person she desperately wants to trust.