The motive behind Charlie Kirk's killing: What we know and don't know

Prosecutors have broadly outlined suspect Tyler Robinson's political views - but many questions remain.

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"Why?"

"I had enough of his hatred," Tyler Robinson wrote back. "Some hate can't be negotiated out."

On Tuesday, authorities released messages between Robinson and the roommate from the hours after the shooting. Officials have said the unnamed roommate was a "biological male" who was transitioning from man to woman and was in a romantic relationship with the defendant.

Prosecutors also gave further details that could point to a possible motive – although there is still much that is not known.