Josh Martin was the main antagonist of the episode Ex Parte of Criminal Minds in season thirteen.
He was portrayed by Nick Fink.
He was a member of The Horsemen, and tried to get approval from his father, who was on the death row, he then, along with his friends and members of The Horsemen, Dalton McCann and Jasper Talbot, devised a plan to save Leonard Hagland from the death row, bunch have taken all the LCD lawyers as hostage and have their plans thwarted by FBI agent Matthew Simmons, he killed Jasper for insulting him, who Simmons entered a back door and killed Dalton, and after a fight against Martin in which he won, after that Martin is arrested, he and his father are execution by lethal execution.