We had one of those about 8 or so years ago. He had a website set up to guide people through the process and even asked them to put it on his webcam, so he could watch. What a sick mind. He started out by going into a chat room for depressed people and picked out someone who he thought was very vulnerable. The victim happened to be a male. The moron pretended to be a very lovely young lady who he shared pictures with. He talked the fellow into committing suicide together. He convinced his victim that he should go first, just in case something went wrong, she (he) wouldn't make the same mistake. The victim went through with it.
After doing a complete and thorough investigation, including using computer forensics, our guys got him. Penalty: Life + 22 years w/o parole. There is justice, but unfortunately, no one can bring back the dead to make things right.