Heard a little discussion about this on a talk radio station on way home from work.
What happened in this case (only caught some), the results would depend on location (state laws) - i.e. Texas laws are different than California law regards to protecting property. I didn't catch the Montana law on this (didn't catch the whole talk show).
If I heard right, there has been a spike of theft in the neighborhood/area and local authorities weren't stepping up response for the area, typically not responding to some or several calls. Since the spike of theft came a spike of frustration to those getting ripped off and not getting police response expected.
We'll this fella was frustrated and determined to do something about it if he could, and he did.
What if going into the garage (hearing noise) then the thief happens to pull out a weapon.... or made a motion like he was about to pull something out, or (and I think this is what I heard) he pleaded for his life at the home owner (home owner has him at gun point).
Video.... business do it, traffic cams, increase of home owners do it (look at all the package theft this time of year)................ I got on the driveway at home & had to cut it there.
Years ago, co-worker got his new radio stolen from his car. He soon installed a new radio, shortly after stolen again. More damage to his dash, but he again installed a third but behind & around the radio he wired a bunch of sharp fishing treble hooks. Couple days go by, get in to go to work and found the radio disturbed, blood and a little skin & meat snagged in the hooks, but the radio was still there. When he reported it again as he did the prior times, this time he told them what he had done and found. He was told this is a trap and would be liable for the medical and charges, but nothing came up on the thief. Also no more attempts to take the radio. He didn't have a car alarm and wasn't going to pay for one either.