Now dad's in trouble for not speaking up about his son's predator?

[theking]

He knew they were F'ing each other  :

Missouri dad knew his teen son was having sex with teacher, officials say. Now he's charged.
The 36-year-old father faces one count of endangering the welfare of a child, while the 26-year-old teacher was arrested on charges of statutory rape and molestation. She's being held in a Texas jail.
A Missouri father has been arrested after authorities say he allowed his 16-year-old son to have sex with his high school teacher over at least a two-month period late last year, newly released court records show. Police arrested the 36-year-old father on Jan. 4 on one count of endangering the welfare of a child, saying he knew about the sex and that the two were using other students as their lookouts, according to Pulaski County Criminal Court records obtained by USA TODAY. USA TODAY is not naming the father to protect his son's identity. Meanwhile the teacher, 26-year-old Hailey Clifton-Carmack, was arrested in Texas after fleeing Missouri, according to a Monday Facebook post by police in Garden Ridge, just outside of San Antonio.