In Pursuit with John Walsh

Luis Frias makes John Walsh's personal most wanted list when Frias allegedly murders his common-law wife in front of their kids. Then, Callahan Walsh explores a bizarre case: Harold "Butch" Knight leaves 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.

Ex-Marine 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. Then, 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 disappears. John Walsh scrutinizes Vaca Garcia's story. Later, Callahan Walsh looks at Brian Keith Freeman who allegedly slits his fiance's throat when their engagement falls apart.

John Walsh investigates a whirlwind romance and the accusation that Lamont Stephenson strangled his fiance and her dog. Later, Callahan Walsh explores police claims that Gloria Schulze is a freeloading 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 sexually abused his stepdaughter for years before taking her life.