I don’t think this was planned.
I believe that this happened at a spur of the moment, and was initiated by a man who did not know how to manage conflict or confrontation in a constructive way. Someone in the group, most probably Mann, did not like being told or asked to comply with a simple request . The request? Please go home. Please leave.
I think that Mann and his friend probably showed up unexpectedly, in the middle of the night. They had drugs, and needed a place to do them. The women let them in. The kids were sleeping. The adults did the drugs, and the sun was coming up. One of the kids woke up, and as a result, one or both of the women asked the men to leave. One of the men didn’t like the way he was spoken to, and struck one of the women, now waking up the other kid. The kids started screaming, and that was it. Mann flipped out & killed someone, and went ahead and killed the rest because he couldn’t leave any witnesses. In his head, he has two choices. Kill all of them, or go back to jail.
I have seen situations like this before. Not resulting in murder, thankfully, but I have witnessed situations where people’s go to solution was violence. It was out of place, a surprise, and incongruous to the circumstances, yet there it was. Not surprisingly, when I saw instances of this behavior, it came from a very specific personality type, and specifically from people who had been incarcerated for previous violent crimes.
They had their throats slashed because a knife was the weapon available. Had they had a gun, Mann would have shot them. This happened very quickly, and was extremely violent. Mann probably killed them all. I believe the other perp was as terrified as the women and the kids.
The children were killed because they witnessed the initial crime, throat slashing of an adult.
This wasn’t a robbery, or rape. This was irrational thinking and violence from a man who was raised to live like an animal.
Unfortunately, I have seen some pretty fucked up shit in my life. Here’s a Rule I live by, and I don’t give a fuck who judges me for it: NEVER become close to, or befriend a man who has done hard time for a violent crime, like armed robbery. Sounds very obvious, I know. You’d be surprised how many people don’t follow that rule. If both of these women had followed that rule, they might be alive.
I’m not victim blaming either. But you just can’t befriend violent felons. They can and will hurt you or kill you under the right circumstances, even if they really like you.