Tonight, new developments in the investigation into Charlie Kirk's assassination as the White House moves to boost security.

Utah's governor revealing new information about the suspect and his romantic relationship with his roommate, he says, who's now helping officials.

As for the man accused of killing Kirk, the suspect has not been cooperating so far. Plus, the stadium-sized memorial planned

to honor Kirk and NFL teams paying tribute tonight. Safety also in the spotlight with the White

House requesting millions of dollars to boost government security as lawmakers face growing

threats. The FBI director under growing scrutiny for his handling of the

investigation. Mexican Independence Day celebrations in Chicago during an ongoing immigration

crackdown and after a deadly ice confrontation near that city. Take a look at this, a huge

tornado touching down in Utah and the latest damage reports from a

twister in North Dakota. The Secretary of State arriving overseas, meeting with Israel's

prime minister after he said President Trump is not happy with the Israeli attack on Qatar.

Here at home, cases of West Nile virus spiking this year as health officials sound the alarm.

Why it's happening and why you might have no idea if you have it.

Buy Now Pay Later platforms soaring in popularity as more people turn to them for hotels, groceries, even DoorDash.

Do you ever worry that any of your customers are going to get in over their head and

overextend themselves?

For sure.

What it may say about our economy, our one-on-one with the CEO of Klarna.

This is NBC Nightly News with Hallie Jackson.

Good evening.

We begin tonight with new developments in the investigation into Charlie Kirk's assassination

and new details about the man

...