No longer. Suicide once was illegal because Louisiana's Napoleonic Code is very French and very Catholic. But the fact that the dead can't be prosecuted caused it to be revised, so that the families didn't suffer from any legal hassles. But concerning an assisted suicide, it is illegal to be involved with an assisted suicide an that could include the suicide-ee as well as the helper. A failed assisted suicide could involve prosecuting everybody concerned.
http://www.foxnews.com/story/0,2933,406281,00.html Report: Hospital Patient Died After Being Left in Chair for 22 Hours. This happened at a state hospital, no doubt in my mind this is where socialized health care would get us.