April 15 is the 105th day of the year (106th in leap years). There are 260 days remaining.
- 1910 — Madeleine Mouton is born.
- 1925 — Fritz Haarmann died.
- 1952 — Donald Harvey is born.
- 1954 — Michelle Knotek is born.
- 1957 — John Bodkin Adams is acquitted of murder and released.
- 1961 — Michael Torrence is born.
- 1964 — Brydon Brandt is born.
- 1966 — Tony Lee Walker is born.
- 1972 — Stanislava Kupava is murdered by Gennady Mikhasevich.
- 1975 — Melanie Suzanne "Suzy" Cooley is allegedly murdered by Ted Bundy (suspected victim).
- 1981 — Charles E. Terry died.
- 1981 — Branislava Ipatava is murdered by Gennady Mikhasevich.
- 1983 — Larry Eyler's victim, Ervin Dwayne Gibson, is found.
- 1984 — Vitala Yakovenko is murdered by Gennady Mikhasevich.
- 1985 — Tracy Housel is apprehended.
- 1985 — Robert Sheldon is murdered by Robert Berdella.
- 1986 — Lynda Moore is murdered by the "Connecticut River Valley Killer".
- 2004 — Karel Kopáč died.
- 2011 — Martin Ney is apprehended.
- 2017 — Reginald Kimbro's 2nd known victim, Megan Leigh Getrum, is found.