I’m sure this was only done in an experimental phase and never used to carry out any actual assassinations. J/k. Yes it was.
If you want to view the 18,000 pages documenting other secret government mind control experiments- Get a job or kill yourself.
If you want to read a 10 page summary of those 18,000 pages, go here: http://www.wanttoknow.info/mindcontrol10pg