By Bill O'Reilly

The sheriff of Pima County, Clarence Dupnik, is not only a law enforcement agent, he is a left-wing activist. And Mr. Dupnik, who has served Pima County for more than 30 years, has now ignited a national discussion about whether political rhetoric may have motivated the killer Jared Loughner.

Sheriff Dupnik believes right-wing rhetoric contributed to the murders, although he admitted to Megyn Kelly on Sunday he has absolutely no evidence to back that up.

Even so, Dupnik continues his campaign:

(BEGIN VIDEO CLIP)

CLARENCE DUPNIK, PIMA COUNTY SHERIFF: It's my belief that -- that the hard right is -- is deliberately fueling the fire against public officials, elected officials, government and the administration because it -- they think that in some way, and maybe they are right, it benefits them in the election process.

(END VIDEO CLIP)

So why would the sheriff say that? Well, one look at his resume provides the answer.

When the tough illegal alien law was passed in Arizona last year, here is how Sheriff Dupnik handled it:

(BEGIN VIDEO CLIP)

UNIDENTIFIED MALE: The Pima County sheriff says he has no intention of enforcing the new immigration law. Clarence Dupnik calls it racist, disgusting and unnecessary. "9 on Your Side's" Steve Nunez is on "Immigration Watch."

DUPNIK: I think the law is one of the worst pieces of legislation I have ever seen in 50 years.

UNIDENTIFIED MALE: Pima County Sheriff Clarence Dupnik says he will not enforce the new immigration law.

UNIDENTIFIED MALE: If the constitutionality of this law is held up, what do you do? Do you enforce it?

DUPNIK: No, because we're going to keep doing what we have been doing all along. We don't need this law.

(END VIDEO CLIP)

So who is we, Sheriff? Certainly not the Arizona legislature which passed the law. Certainly not the people of Arizona, 70 percent of whom support the law. I guess we, Sheriff Dupnik, is you and your liberal pals.

So here's a clue. As a sworn officer of the law, you have a duty to uphold it. By saying you would not, you have violated your oath.

"Talking Points" is not in business to put Sheriff Dupnik out of business. If the good people of Pima County like him, that's fine with me.

But let's be honest here: Dupnik is an ideologue. He, along with many far-left pundits, is using the murders of six people to make political points. With all due respect, I'd never, never vote for a person like that for anything.

Again, as an American, Clarence Dupnik is entitled to hold any opinion he wants. But as a law enforcement officer, he has a responsibility to all the citizens. Sheriff Dupnik has turned a horrific murder case into a political circus.

Who does that serve, Sheriff? What good does that do? You have made a terrible mistake, no question about it.

And that's "The Memo."

Pinheads & Patriots

Our pal Jon Stewart weighed in on the Arizona situation:

(BEGIN VIDEO CLIP)

JON STEWART, HOST, "THE DAILY SHOW": We live in a complex ecosystem of influences and motivations, and I wouldn't blame our political rhetoric any more than I would blame heavy metal music for Columbine.

(END VIDEO CLIP)

So is Mr. Stewart's analysis there pinheaded or patriotic? Please vote on BillOReilly.com.

Monday night we told you that actor George Clooney said the Obama administration could do more to help the people in Sudan. Mr. Clooney said that on CNN.