Georgia 'shooter' Colt Gray's grandfather Charles Polhamus reveals teen violently lashed out two weeks before Apalachee High School shooting - and blames killing spree on dad's parenting
Charlie Polhamus, 81, told DailyMail.com grandson Colt Gray, 14, was 'punching holes in doors' and threatened to 'f*** him up' two weeks before opening fire on students and teachers.