As The Factor reported last night, 32-year-old Kate Steinle was murdered walking with her father in San Francisco, allegedly by a criminal alien who had been deported five times and had seven felony convictions in the USA.

That man, 45-year-old Juan Francisco Lopez-Sanchez, is now charged with murder.  He was arraigned today in a San Francisco courtroom.

Talking Points said last night that the mayor of San Francisco, Ed Lee, and the eleven city supervisors are directly responsible for Kate's death.

That's because San Francisco is a sanctuary city that does not cooperate with the federal government, even on holding and identifying criminal aliens.

Sanchez was in custody in San Francisco and the sheriff -- Ross Mirkarimi -- let him out, defying ICE officials.

REPORTER: “Why not just inform ICE when you have a felon in your custody?  Why not draw the line at someplace where you're protecting the public?”

SAN FRANCISCO SHERIFF ROSS MIRKARIMI: “They already know he's in our custody.  They actually knew because he came from serving time in another prison.”

REPORTER: “So why not work with them to make sure he doesn't get released?”

SHERIFF MIRKARIMI: “Because a detainer request is not a legal instrument.”

Sheriff Mirkarimi should resign immediately.

I mean, what kind of law officer allows a known felon to walk free when the feds want him in custody?

The sheriff is incompetent.  Period.

And so are the folks who run the city of San Francisco, most of whom are now hiding.

CBS News caught up with San Francisco Supervisor Julie Christensen:

REPORTER: “In the last 18 months, more than 10,000 undocumented immigrants have been released from custody in California without immigration officials being notified. Since Steinle's death, San Francisco elected officials have been avoiding speaking about sanctuary.  Julie Christensen is a member of the board of supervisors.”

JULIE CHRISTENSEN (D), SAN FRANCISCO BOARD OF SUPERVISORS: “I am not going to address that in detail.”

REPORTER: “And the fact that if San Francisco wasn't a sanctuary city, would Kate still be alive?”

CHRISTENSEN: “I'm not gonna go there.”

Ms. Christensen is a coward.

The cold truth is Kate Steinle is collateral damage to the insane far-left politics that have long-corrupted the City by the Bay.

Again, dangerous people are walking around because of political correctness.

The mayor and the supervisors want to seem sympathetic to illegal aliens.  That's what this is about, them and their liberal profile.

The whole thing is absolutely disgusting.

Now there is some good news, as Kate may have not died in vain.

Senate Majority Leader Mitch McConnell has told The Factor he is meeting with the Senate leadership to discuss Kate's Law.

As we suggested last night, Congress should pass legislation that would impose a mandatory minimum five-year sentence on any illegal alien that is deported and then comes back.

The word mandatory is crucial.  There are laws on the books now that are being ignored. Congress must write Kate's Law so if officials do not enforce the mandatory sentence, they themselves can be prosecuted.

Congressman Matt Salmon of Arizona tells us he is writing Kate's Law even as we speak.

The congressman is looking for co-sponsors, and we hope representatives from both parties will sign on.

If they do, we will tell you who they are.

If anyone opposes Kate's Law, we will absolutely tell you who they are.

Also, you can get involved.  We have a petition on BillOReilly.com that supports Kate's Law.  We hope you sign it, and we will forward the petition to the House and Senate leadership, as well as to the White House.

It is long past time for the Congress of the United States to protect the American people.

Every president since Ronald Reagan has not done so.

So Congress must act on illegal immigration.

This sanctuary city business has got to end.

Any American city, town or county not cooperating with Homeland Security should immediately lose federal funding.

Enough is enough!

And that's the memo.