December 15 is the 349th day of the year (350th in leap years). There are 16 days remaining.
- 1909 — Ralph Von Braun Selz is born.
- 1950 — Muthukutty Chandran is born.
- 1969 — Hans Wilhelm Bassenauer died.
- 1969 — Hermann Duft died.
- 1977 — Nikolay Sakharov is apprehended.
- 1983 — "Green River Killer"'s victim, Kimi-Kai Pitsor is found.
- 1996 — Joe Metheny is apprehended.
- 2003 — Charles Cullen is apprehended.
- 2004 — Sonya Caleffi is apprehended.
- 2009 — Venera Obolashvili is apprehended.
- 2010 — Antonio Rodriguez's victim, Casey Mahoney, is found.
- 2016 — Theodore Johnson is apprehended.
- 2017 — Alan Wilmer died.
- 2020 — Roscoe Artis died.