“Burgundy-colored T-shirts [the color shirt worn by the shooter] make me uncomfortable and he used to be so understanding he stopped wearing it around me. That person is completely gone and I miss him so fucking much,” Bill said in his Reddit post.

Bill says his relationship with his mother has also suffered.

“The relationship with my mom is dependent on whether my dad is there or not, ’cause then it’s pretty much all about conspiracy theories,” Bill told VICE News. “[The relationship] used to be fine but deteriorating quickly, [especially] after telling her that if she doesn’t start putting her foot down, I’m leaving with no interest in seeing my dad again.”

But despite the threats to leave home, Bill’s mother has not stood up to his dad.