Okay I've gotten a little more info. Some of this is gonna be repetitive to what's already been posted. Some of it is gonna be very graphic.
He killed Nancy on Friday night. He overpowered her, shoved her to the floor and tied her hands and feet or vice versa, put his knee in her back, wrapped the TV cable around her neck and strangled her by pulling up on it, and smashed her face into the floor after she died, accounting for the blood under her head. The police theory is that she told him she was leaving and taking Daniel.
About 12 hours later on Saturday morning, he killed Daniel in his room with the Crippler Crossface.
About 18 hours after that, on Sunday, he went into his weight room in the basement, wrapped his neck with some kind of cloth, fixed the pulley cable from his weight machine around it with the stack engaged, held himself down on the bench with a pair of heavy dumbbells, and then released the dumbbells, letting the pulley snap up and hanging himself on the weight machine.
The police theory is not roid rage because of the time gaps between the killings. They believe steroids may or may not have contributed to his mental problems as he's been acting in a paranoid manner for the past year or so, believing somebody was out to get him, but they are not looking at them as a direct cause.
They suspect killing Daniel was in the nature of a control freak issue---the idea of the child being taken away, or being under someone else's control after they die, is too much for them---but mostly because this is the most typical scenario in parental killings, and they don't think they'll ever know what was going on in Chris' head.
There was no note. They're still not sure if he text messaged anybody other than Chavo. It was Chavo who alerted the authorities that something was wrong.