Absolutely.
One of two police chiefs on-scene (Arredondo) ordered his officers to stand down, and he is a contributer to Beto O'Rourke's election campaign. (Unfortunately I can no longer locate that article).
Here’s a source for that.
https://twitter.com/bendynaa/status/1530855055623999488?s=20&t=6eIWUsIq2F753SebioZBdQ
Looking up contributions in the FEC database used to be surprisingly easy.