21 November 1943 (+) is born in Cleveland, United States.

25 November 1986 (x) abducted and held imprisoned Josefina Rivera in Philadelphia, United States.

3 December 1986 (x) abducted and held imprisoned Sandra Lindsay in Philadelphia, United States.

23 December 1986 (x) abducted and held imprisoned Lisa Thomas in Philadelphia, United States.

2 January 1987 (x) abducted and held imprisoned Deborah Dudley in Philadelphia, United States.

18 January 1987 (x) abducted and held imprisoned Jacqueline Askins in Philadelphia, United States.

7 February 1987 (-) tortured to death Sandra Lindsay in Philadelphia, United States.

18 March 1987 (-) electrocuted Deborah Dudley in Philadelphia, United States.

23 March 1987 (x) abducted and held imprisoned Agnes Adams in Philadelphia, United States.

25 March 1987 (x) is arrested in Philadelphia, United States.

2 April 1987 (x) tries to commit suicide by hanging from a shower pipe at the Philadelphia Detention Center in Philadelphia, United States.

20 June 1988 (x) Start of the trial against Heidnik in Philadelphia, United States.

1 July 1988 (x) is sentenced to death for two counts of murder in Philadelphia, United States.

6 July 1999 (-) is executed by lethal injection in Benner Township, United States.