Conspiracy.

A DEA agent goes undercover in a prison to find out how the gangs are able to run drugs.

It turns out drugs are only a small part of the operation. The main thing is guns.

But it's government itself that's arming prison gangs --to build an army to enforce martial law.

In the end a prison riot becomes the excuse to begin the project.

--E. R. O'Neill

(It's not my theory: some Branch Davidians believe David Koresh founds out the government's secret plot to impose martial law and had to be killed by the DEA.)