Earlier this year, 58-year-old former Olympic equestrian Michael Barisone stood trial in a Morristown, New Jersey, courtroom for the attempted murder of his own riding student, Lauren Kanarek. Barisone's legal team of Ed Bilinkas and Christopher Deininger would gamble on an unusual defense. They claimed that at the time of the shooting Barisone was insane, and not legally responsible for his actions. Insanity pleas are uncommon and rarely successful. Barisone's defense would be that Lauren Kanarek had driven him over the edge, in large part by her use of social media.

Michael Barisone speaks out in his first television interview since the end of his trial.

Megan Hargan was suspected of killing her mother and sister. Her defense had an unusual theory: her sister was the one who pulled the trigger – with her toe. "48 Hours" correspondent Peter Van Sant reports.