The head of a local campus ROTC is murdered, and the main suspect is the man's mentally disabled teenage son, whom he had frequently beaten. However, Pete and Linc, who have befriended the youth, believe he is innocent.

Following a death of an immigration agent at a car wash where an undocumented immigrant (and a friend of Pete's) work, the Squad finds a cop involved in the illegal entry of Mexican youths across the border - all tied to a village in Sonora. The officer and Greer are at odds on how to handle the case.