[Paladin2]

"Why did the investigation drag on for well over a year after Muller's people had concluded that Trump didn't collude with Russia? "

So they could try to induce Trump to commit some act(s) that could be prosecuted as OBSTRUCTION. All Weasel Mueller and his Coven had was Process Crimes to generate, if possible.

Totally crooked.

[libertylover]

So they could try to induce Trump to commit some act(s) that could be prosecuted as OBSTRUCTION.

Yep. And CNN and others did their very best to get Trump to fire Mueller so they could claim obstruction.