17 March 1942 (+) is born in Chicago, United States.

20 May 1968 (x) is sentenced for sodomy and sent to the Iowa Men Reformatory in Anamosa, United States.

19 June 1970 (x) is paroled from the Iowa Men’s Reformatory where he was sent on a sodomy-conviction in Anamosa, United States.

12 February 1971 (x) is arrested and charged with assault of a teenage boy in Chicago, United States.

2 January 1972 (-) stabbed to death Timothy Jack McCoy in Chicago, United States.

20 January 1977 (-) killed John Szyc in Chicago, United States.

1 July 1972 (x) marries his second wife Carol Lofgren in Chicago, United States.

31 July 1975 (-) abducted, assaulted and strangled John Butkovich in Chicago, United States.

6 April 1976 (-) raped and strangled Darrell Samson in Chicago, United States.

14 May 1976 (-) sexually assaulted and strangled Randall Reffett in Chicago, United States.

14 May 1976 (-) sexually assaulted and strangled Samuel Stapleton in Chicago, United States.

3 June 1976 (-) strangled Michael Bonnin in Chicago, United States.

13 June 1976 (-) strangled William Carrol in Chicago, United States.

11 December 1976 (-) strangled Gregory Godzik in Chicago, United States.

15 March 1977 (-) strangled Jon Prestidge in Chicago, United States.

5 July 1977 (-) murdered Matthew Bowman in Chicago, United States.

15 September 1977 (-) murdered Robert Gilroy in Chicago, United States.

25 September 1977 (-) murdered John Mowery in Chicago, United States.

17 October 1977 (-) tortured and strangled Russell Nelson in Chicago, United States.

10 November 1977 (-) strangled Robert Winch in Chicago, United States.

18 November 1977 (-) strangled Tommy Boling in Chicago, United States.

9 December 1977 (-) strangled David Talsma in Chicago, United States.

30 December 1977 (x) raped and tortured Robert Donnelly in Chicago, United States.

16 February 1978 (-) strangled William Kindred in Chicago, United States.

22 March 1978 (x) raped, drugged, whipped and tortured Jeffrey Rignall in Chicago, United States.

4 November 1978 (-) strangled Frank Landingin in Chicago, United States.

11 December 1978 (-) murdered Robert Piest in Chicago, United States.

22 December 1978 (x) Start of the excavations in the house of Gacy in Chicago, United States.

22 December 1978 (x) is placed under arrest as a suspect in the abduction of Robert Piest in Chicago, United States.

13 March 1980 (x) is sentenced to death for the murder of 33 boys in Chicago, United States.

15 February 1983 (x) is stabbed once in the upper arm with a sharpened wire by Henry Brisbon aka The I-57 Killer in Chester, United States.

10 May 1994 (-) is executed by lethal injection in Crest Hill, United States.