The hearing comes in the wake of this month's protests of the police shooting of Michael Brown in Ferguson, Mo., which produced images of heavily armed police facing off with civilian protestors. Politicians like McCaskill and Sen. Rand Paul (R-KY) spoke out against the "militarization" of U.S. law enforcement. President Barack Obama has also ordered members of his administration to reexamine the programs.
“We need to de-militarize this situation," McCaskill said earlier this month. "This kind of response by the police has become the problem instead of the solution."