Doug says his dad "never drove more than 70 his whole life", "never planned anything his whole life", and "never planned to hurt anyone his whole life" but it was well established that Doug had almost no relationship with his father, who had run out on them when he was young, and prior to season 2 they hadn't seen or spoken to one another in more than a decade; in this episode he also talks about how his dad would disappear for months at a time, so Doug really doesn't have any knowledge about what his dad did it didn't do in his whole life.