When the German cannibal Armin Meiwes was on trial, it was actually a legal conundrum. Meiwes' victim had explicitly consented to being killed and eaten, even dictating how he wanted to have it done to himself. So was it murder or more of a convoluted version of assisted suicide ("killing on demand" is the legal term in Germany)? He was eventually convicted of manslaughter and got a prison sentence of eight and a half years, a few years later changed to a sentence for life.