He'd solve it in ten minutes I'm afraid.. And that's assuming it was carried out successfully which is extremely unlikely.
The drunks even in their state would be able to say that the shot came from the front of the bus and none of them were there. Columbo would look at the front and see the hole and the mirror.
There would no drunks' fingerprints on the gun at all.
The shot would have to be bang on target to kill and not just to wound. Harry would find it near impossible to negotiate driving a big bus and shooting the gun on target through a mirror.
With a few tweaks this might get into a script consultation for an episode but I don't think it would get past that.

It sounds interesting. You should flesh it out and publish it on the fanfic site. I really enjoyed those stories.

Just a reminder - There are only a few of us who use the forum. We do not use language like that even if it is disguised. That might be acceptable on MTV or YOu Tube sites but not here. Obviously no harm was meant but lets keep the language here mature and respectful. Thanks.

I just checked what I wrote and wonder about your reply. I thought I sounded civil, maybe a bit preachy, and I stand by what I said. It was not a personal attack, just a reminder. Your reply was ... well, what can I say. But lets end it at that and spare the great users of this forum.

However, if you did not mean ****ty when you wrote ****e, I apologize.