Hamm says the two were at a party where they got into an arguement. They had been drinking at a party where he "blacked out" and when he came to, realized what he had done. They spoke, and talked everything out.
When the two returned home, they started arguing again. That's when Hamm lost it and killed 20-year-old Meagan Fambry.
Listen to the startling 911 call: