The article that you linked to says nothing about releasing a video.
So much for police hiding ...
“Right when we pulled in, we saw officers sitting in patrol cars”
http://www.wacotrib.com/news/twin-peaks-biker-shooting/updated-xwaco-police-chief-says-officers-fired-rounds-during-twin/article_fd337d6e-a7af-5e2b-84b9-fb5480b6efa0.html