What is strange to me was that, according to the affadavit, it seems the police had no idea about the ex-husband until they interviewed family and friends. This makes me think that the Tepes never reported MMs multiple stalking/terroristic threat episodes - assuming they occurred over the 8 year period since the divorce. Assuming the incident on Dec 6 showed MM on their stoop (i.e. curtilage) via the ring camera (and possibly saying something into it), you would think the police would immediately have focused on MM had they been notified of the Dec 6th incident. I think it was unlikely he was there on Dec 6th to plant cameras, bugging devices, car trackers etc. in order to track their movements. After all, he came back to the house on Tuesday Dec 30 to commit the act between 1 AM and 4 AM when most people are at home and asleep - no need for any tracking device. Perhaps on Dec 6th (Saturday) he was hoping they would be home and was planning to commit the act then, only to find out they were away. But it is just as plausible he went there on Dec 6th to simply terrorize them knowing, via social media - (theirs or a friend of theirs) they were going to be at the game and knowing they had a ring camera. I wonder who was taking care of the children that weekend? I assume they were not in the home with a caretaker.
Lastly, given what we now know regarding MM's longstanding resentment of and threats to MT as per the affdavit and how unhinged he clearly was (especially at the end), I can only imagine MM's thought processes as he watched ST and MT's wedding video on YouTube over and over again.