This is NBC Nightly News with Jose Diaz Ballard.

Good evening. We begin tonight with Charlie Kirk's widow speaking out publicly for the first time since the conservative activist was assassinated earlier this week.

Erica Kirk, through tears and pain, referring to her husband as a martyr. She vows to continue his nationwide college tour. It comes as we learn

new information from authorities, and tonight, President Trump is telling NBC News exclusively that he would

like to see the nation heal, but blamed what he calls the radical left as a barrier to it. That comes as

the reaction to Kirk's assassination is becoming

another flashpoint with people losing their jobs after posting their reactions online.

Our Morgan Chesky has been tracking it all and starts us off from Utah.

And our world is filled with evil.

But our God, you guys, our God is so good.

Speaking publicly for the first time since the assassination of her husband,

Erica Kirk stood last night by the very desk where the Turning Point USA founder would record a show,

referring to him as a martyr.

The evildoers responsible for my husband's assassination have no idea what they have done.

You have no idea the fire that you have ignited within this wife, the cries of this widow will echo around the world like a battle cry. With crowds gathered outside, Kirk promised to press on

with the nationwide college tour, along with the Charlie Kirk radio program and podcast.

The movement my husband built will not die. It won't. I refuse to let that happen.

No one will ever forget my husband's name, and I will make sure of it.

Sharing her grief. She posted these images by her late husband's casket.

Amid the morning, authorities in Utah deepening their investigation into Tyler Robinson.

The 22-year-old, they believe, fired the single fatal shot at Utah Valley University,

killing Kirk.

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