April 13 is the 103rd day of the year (104th in leap years). There are 262 days remaining.
- 1924 — John Balaban is born.
- 1950 — Joseph Paul Franklin is born.
- 1971 — Roman Burtsev is born.
- 1977 — Warren Harris is apprehended.
- 1983 — Joe Rapini is allegedly murdered by Mike DeBardeleben (suspected victim).
- 1984 — Christopher Wilder is apprehended.
- 1984 — Christopher Wilder died.
- 1984 — Andrew Six's victim, Justin Hook Jr., is found.
- 1992 — "I-90 Jane Doe" is allegedly murdered by Clark Perry Baldwin (suspected victim).
- 1993 — Sergei Ryakhovsky is apprehended.
- 1995 — Sean Patrick Goble is apprehended.
- 1996 — Jacques Coetzee is apprehended.
- 2001 — Émile Louis's victim, Madeleine Dejust, is identified.
- 2001 — Émile Louis's 6th known victim, Jacqueline Weiss, is identified.
- 2006 — Robert Shulman died.
- 2008 — Nathaniel Bar-Jonah died.
- 2008 — Anders Eklund's victim, Engla Juncosa Höglund, is found.
- 2008 — Anders Eklund is apprehended.
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