What's the difference between a building demolition and a building collapse?

That's the question facing a contractor that the city of Denver wants to block from demolishing - or collapsing - any more buildings in the city. He says he did nothing wrong - or so he told our Marshall Zelinger.
Published: 6:44 PM MDT July 10, 2019
Updated: 6:42 PM MDT July 10, 2019