What happens to max on Christmas Eve in Freak the Mighty?

Answer 1

After they all open one gift, Max goes to sleep.

Then he wakes up with a big hand covering his face. It is Kenneth Kane (Max's father). then Kenny takes Max to a lady's apartment. (She is not at home for the week.) They stay there and Max sees his dad choking Loretta Lee. Max remembers watching his dad murder his mom. He starts yelling at his father saying that he knows that it was him that killed Max's mom Annie.