WARNING: The #video in the link briefly shows the woman after she was shot in the face.
Here is another video of the incident on a news site:
https://zeteo.com/p/ice-kills-legal-observer-minneapolis-minnesota-trump
The murdered woman's car wasn't even blocking the road. She'd just waved another car by before ICE/CBP pulled up and shot her in the face. They could have just driven around her.
Even if she'd been blocking the road, they still had NO RIGHT to just shoot her.