This is all plausible. It's also plausible that this was kicked off by a fight "a couple of weeks ago".
The reality exists in domestic abuse cases, purely verbal or otherwise often times the parent reports it. I still haven't seen confirmation of the claim, by the mother, that said warrant exists. It's also possible daughter shared argument fight with mom. Mom escalated it from argument to abuse and attempted to file a report.
Lots of possible conjecture here without a lot of facts.
That line of thought, whatever the specifics, could be a perceived overbearing mother "interfering" in a grown woman's relationship. You add drugs to that mix, all the more likely.
Daughter just moved, we don't know why.
I still haven't seen anything regarding where the children are currently. With their father, a baby sitter, or parents. Just don't know.
There is a very reasonable line of thinking that daughter and "ex"boyfriend (domestic abuse and drugs or not) decided to "escape" mom. Daughter met "ex" out a bar. They took her car. There is a note.
Tons left to be discovered. I would say right now, based on what we know 50/50 running away from mom and/or responsibilities/murder.