Rose Atkins (BBC reporter)

Rose Atkins' report contains footage which, again, you may find distressing.

The first video we have of Alex Preti, he's in the road, holding a phone and talking with a federal agent.

The officer pushes him and he steps backwards.

Kristi Noem is U.S.

Homeland Security Secretary.

This is her account of why Alex Preti died.

But in this video, as in others, Alex Preti had nothing in one hand, a phone in the other.

We see two people interacting with an agent.

We then see an agent push one of those people.

Then push the second person.

Alex Preti steps between them and the agent and is pepper sprayed.

He's wrestled to the ground by a number of agents.

He's on his knees, bent over.

His hands are on the floor and he's struggling against being held down.

One agent repeatedly strikes in the direction of his head.

And take note of this agent.

He has nothing in his right hand, reaches down and removes what appears to be a gun from Alex Preti's waistband.

Then he steps back, holding the pistol.

which appears to match this image shared by the authorities.

Carrying this type of gun is legal in Minnesota with a valid permit.