A 25-year-old man believed to be responsible for an explosion that ripped through a Palm Springs, California, fertility clinic left behind “anti-pro-life” writings before carrying out the attack.

The father of Guy Edward Bartkus is speaking out after news that his son is the person investigators believe to be the suspect in the bombing at a Palm Springs fertility clinic on Saturday. Richard Bartkus says that he hasn't spoken to his 25-year-old son in more than a decade and that he is not the person he remembers.