Hi Gab,
I would recommend keeping a journal of incidents like these in the event that you have to go to court to get custody of your kids. Even though the police didn't intervene, they were called because someone was scared enough and thought they were needed. What he did to your son shows he has no empathy. I know it can be very hard to make kids sit still and when my toddler won't sit still or I can talk him into it, I just try another day and it works. After an incident like this do you really think T will work and teach your H respect through love instead of fear?
big hug
Sesquix