In Pursuit with John Walsh

Luis Frias makes John Walsh's most-wanted list after allegedly stabbing his common-law wife to death in front of their children; Callahan Walsh explores the case of Harold Butch Knight, who left a trail of clues after confessing to killing his wife.

John Walsh spotlights freshman Jihad Ramadan, who allegedly introduces a knife to a fistfight that claims a star college student's life. Later, Callahan Walsh looks for Thayne Smika, who, police believe, shoots his roommate in cold blood over back rent.

Raymond "R.J." McLeod seems like a knight in shining armor to one single mom, but as John Walsh reveals, she was far from safe. Callahan Walsh discovers how rapper Maurice Nesbitt's constant abuse of his girlfriend eventually turns deadly.

Salvador Vaca Garcia tearfully appears on local news when his girlfriend vanishes. John Walsh scrutinizes Garcia's story. Later, Callahan Walsh looks at Brian Keith Freeman who allegedly killed his fiancé when their engagement fell apart.

John Walsh investigates a whirlwind romance and the accusation that Lamont Stephenson strangled his fiancé and her dog. Callahan Walsh explores claims that Gloria Schulze is a freeloader drunk driver who repeatedly cheats the legal system.

John Walsh profiles Mike Bullinger's secret double life that police believe ended in a triple homicide. Callahan Walsh looks at the case of Tomas Magallon Gonzalez, who allegedly abused his stepdaughter for years before taking her life.