Michael Avery, the 35-year-old suspect from Syracuse who died in the carnage, had rented a Ford Expedition — and then spent Dec. 30 driving around to different places in Monroe and Ontario counties to buy about a dozen gas cans to fuel his deadly plan, officials said.

Chilling video footage captured the death driver buying some of his supplies, authorities said.

But officials acknowledged that while they have since searched Avery’s hotel room at WoodSpring Suites Rochester Greece, where he stayed before the horror, as well as his car, which he left at the Rochester airport, they are no closer to figuring out his motive.

[Right now, it looks like a mental-illness related incident. So far, that’s the only explanation police have, but that could change if more evidence is discovered. The intent, though, is obvious. — Ed]