John Hennigan is a fictional character portrayed by Trevor St. John in the TV series The Mentalist.
In the first episode they appeared in, titled Violets (season 6), they were 42 years old.
They appear in 1 episodes out of a total of 151 aired
Episodes1
Violets
episode S6.E16 march 2014With the help of his FBI colleagues, Patrick sets up an elaborate con to catch an art thief who killed a man during one of his robberies.