Good evening. Tonight the grieving in Boulder, Colorado, the investigations and the push for change.

In short, everything that comes in the aftermath of mass shooting in America, which today included a hero's tribute for officer Eric Talley.

Hundreds of people lining the streets as a hers took his body from the coroner's office to a local funeral home.

They also flocked to what the officers to the officers from a patrol vehicle, bringing flowers, wreaths and cards, turning it into a makeshift shrine.

He was first on the scene Monday, lost his life, trying to save others. Said one mourner today.

I know it's the job of a police officer to run into danger, but shouldn't we make the world safer for them?

To that point, we're learning more about red flags and the alleged shooters' background as well as when and how he armed himself.

We're also witnessing a community in mourning in about an hour, a candlelight vigil begins and will bring you moments from when it does.

Also tonight, new revelations about the January 6 insurrection, specifically evidence of coordination before the fact between the so-called oath keepers and so-called proud boys.

And later new developments in democratic efforts to get a voting rights bill through the Senate, including a new threat from a Republican leader Mitch McConnell of a nuclear winter, if Democrats end the filibuster to pass it.

A busy night ahead, first the latest from Boulder and CNN's Kim L'A.

Investigators continue to collect evidence at King's Super's grocery store and search for a possible motive from his online activity, a law enforcement official tells CNN, to one of the biggest questions, the gunman's connection to this specific location.

Why did he drive to this Boulder store 30 minutes from his home?

The Suspect's family home is in the suburbs of Denver, where police are digging into the background of Ahmed Al-Issa. The only incident on his record, a third degree assault in 2017. He admitted he cold cocked the classmate at school.

I saw a man with a beard and a ar 15 style rifle.

The gunman carried a Ruger AR 556 pistol. The arrest warrant says he purchased it six days before the shooting. That timing suggests to investigators as a law enforcement source, the CNN, that this attack was planned.

My understanding is that it was purchased at a gun dealer outside of Boulder, potentially in our vata where he lives.

Across Boulder, the enormity of the loss settling in, mourners line the city streets to watch the procession for Boulder police officer Eric Tally, fellow citizen, father of seven, moved from the coroner's office to a funeral home.

There's a hole. There's a hole in her family that won't be filled.

The uncle of Ricky Olds who worked at the grocery store honored the life she would never live.

Saddened that she didn't get the experience motherhood. She didn't get the experience marriage. She didn't get to, she was 25 years old.

Boulder grapples with the sense of helplessness that they are likely not the last American city to experience this.

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