He made himself! This would make an interesting CSI episode:

The body of a 41-year-old man was found in a wooded area next to a guillotine he built and used to kill himself, police said.
The man, from the Detroit suburb of Melvindale, was discovered Monday by workers from a shopping center near his home.
[…]
Allen Park Deputy Police Chief Dale Covert said the roughly six-foot tall guillotine was bolted to a tree and included a swing arm. Covert said police also found several store receipts detailing the materials used to assemble the device.

(via)