If I remember correctly...the Federalized Texas Rangers were accused of “hiding” evidence...either through inept evidence control or other reasons...that was useful for the civil trials that came after the Waco I...just a coincidence that Waco is the home of the Texas Ranger Hall of Fame.
I know of examples of Texas Ranger excellence in investigation to keep the law in order...local cops gone bad...and now in prison.
History tells the “good, bad, and ugly”.
http://www.jeffhead.com/liberty/waco_mas.htm
https://en.wikipedia.org/wiki/Texas_Ranger_Division
https://en.wikipedia.org/wiki/Texas_Ranger_Hall_of_Fame_and_Museum
Though the mills of God grind slowly;
Yet they grind exceeding small;
Though with patience He stands waiting,
With exactness grinds He all.
https://en.wikipedia.org/wiki/Retribution_(poem)
Carol Moore did some excellent research. Here “waco holocaust museum” is deeply disturbing.