Andrew Pollack is the father of Meadow Pollack, a student who died during Marjory Stoneman Douglas High School shooting in Parkland, Fla. Pollack has written a book (Why Meadow Died) that shows the Broward County school district knew full well about his obsession with guns and murder — and then let him practice shooting at school. Mr.Polack joins Tim at 915 this morning.