The task force comes under intense scrutiny when the FBI suspects that an insider is selling covert information. Bailey agrees to a mock field training exercise designed to root out the mole, where he learns that one of the agents, Art Behar, has a personal grudge against him for being involved with Behar's ex-wife, Ellen. When one senior investigator, Ed Portero, is found murdered in the command center, Sam tries to profile which one of the team's edgy members might benefit the most from tra ...[Read Story ]