All the breathing goes through the nose and if that becomes congested for a number of reasons than he can’t breath. The nose is not enough. Taping a mouth is extremely risky.
Why would you tape the mouth??
I know in NYC/USSR, I’d be found guilty already before a trial!!
If (GOD FORBID!) one of my nephews broke into a house and got lead, I’d be crushed but I’d hold no grudge.
If they got caught and were later suffocated to death, I’d be looking for my pound of flesh.