The Naturals by Jennifer Lynn Barnes

Cassie knows things about people as soon as she meets them based on their behavior, personality, and environment.  Her mother went missing when Cassie was just 12 years old.  The police think that, based on the amount of blood, she was killed.  Cassie wants to believe she is still alive.

The FBI wants to have her in their program for teens with special skills.  Cassie agrees when she learns the team works on cold cases - she can finally solve her mother's case!