April 10 is the 100th day of the year (101st in leap years). There are 265 days remaining.
- 1930 — Tetsuyuki Morikawa is born.
- 1948 — Madeleine Mouton died.
- 1957 — Valeriy Andreev is born.
- 1962 — Ray Davis is allegedly murdered by "Zodiac Killer" (suspected victim).
- 1962 — Mariusz Trynkiewicz is born.
- 1963 — Hoshang Amini is apprehended.
- 1970 — Robert Gleason is born.
- 1977 — Aletha Byrd is murdered by Montie Rissell.
- 1981 — Michael Cluck is allegedly murdered by Randy Kraft (suspected victim).
- 1983 — Gail Lynn Mathews is murdered by Gary Ridgway.
- 1984 — Mei Leung is murdered by Richard Ramirez.
- 1987 — Kathy Allen is murdered by Andrew Six.
- 1987 — Ayumi Kuboki is born.
- 1992 — Jerome Dennis's 2nd known victim, Jamillah Jones, is found.
- 1992 — Jerome Dennis's 3rd known victim, Elizabeth Clenor, is found.
- 1992 — Jerome Dennis's 4th known victim, Stephanie Alston, is found.
- 1993 — Lilly Jones is attacked by Charles Ray Vines.
- 1995 — Connie Hayward is murdered by Anthony Balaam.
- 1997 — Lindsey Robert Rose is apprehended.
- 1998 — Alfred Gaynor is apprehended.
- 2017 — Reginald Kimbro's 1st known victim, Molly Matheson, is found.