[Excuse_My_Bellicosity]

I also remember a strong possibility that his fellow cops or ATF agents shot the cop on accident. But without any sort of investigation or evidence gathering, we'll never know. It's much easier to just burn the place to the ground and write it off.

If the cops and ATF were so interested in capturing the guy, as opposed to just killing him outright, why didn't they nab him outside of his house where it would be a lot easier to control the situation, instead of forcing a seige situation?

It's easy to write this off as a psycho who got what he deserved. It's not so easy to blow it off when they come for you because your neighbor got concerned when he saw you bringing your guns back to your house after a hunting trip or day at the shooting range (how many guns can you own before it's considered "stockpiling"?). Do you want a BATF or other government agency that is free to kill people at will because it's too much of a hassle to prosecute them?

[Shooter 2.5]

They sent a couple of sheriffs out to talk to him. They weren't interested in "nabbing him" on the word of a couple of neighbors.
When Beck killed the motorcycle cop, that's when the rest of the shooting started.

There are a lot of other cases where the police gunned down suspects. This isn't one of them.

[Poohbah]

I also remember a strong possibility that his fellow cops or ATF agents shot the cop on accident.

First off, the autopsy verified that the deputy was shot at a descending angle, consistent with someone shooting from the second floor of Beck's house.

Secondly, even if the deputy WAS a victim of friendly fire, are you familiar with "felony murder?"

[Shooter 2.5]

Police officers came to my house in the dead of night to check out who was the guy with the gun near my property. When I answered the door, I did have a gun on me, I didn't react like Beck did, the police were polite and my house is still standing.

And no, there was no "strong possibility" it was friendly fire.
The trajectory was from the house.
The bullet that struck the cop was the caliber that Beck was using.