Shot multiple times in the back at 5:00am in DC or a suicide by double gunshot to the back of the head.
A former Air Force buddy of mine did commit suicide by putting a gun in his mouth and shooting himself in the brain twice. No question it really was suicide, not an "Arkancide." That incident has caused me to be a little less sure about whether something really is a suicide, or instead is a version of Arkancide.