Dec. 21, 1997: Susannah Chase, 23, is found beaten in an alley near her home at 18th and Spruce streets in Boulder about 3:40 a.m.
Dec. 22, 1997: Chase dies.
January 1998: Boulder police bring in an FBI psychological profiler to help find the killer.
Jan. 29, 1998: DNA from semen is found on Chase’s clothing.
Aug. 10, 2000: In Laramie County, Wyo., Diego Olmos Alcalde attacks a young woman outside her apartment. He chokes her to keep her from screaming, but she manages to honk her car horn and alert her family. Police catch up to him a short time later. The victim and her family identify him as the attacker. He is charged with kidnapping and later convicted.
January 2001: Boulder police announce that famed criminologist and forensics expert Henry Lee will consult with them about the Chase case.
Aug. 22, 2003: The Wyoming Supreme Court reverses Alcalde’s conviction because during jury deliberations a juror had to take leave because of a medical condition, and the trial judge erred by allowing an alternate juror to enter the jury’s deliberations after they had started.
Jan. 20, 2004: Police release a DNA test used to create a racial profile of Chase’s killer.
Sept. 24, 2004: Alcalde is sentenced to seven to 10 years in prison after being retried and convicted.
July 2007: Alcalde is paroled and later allowed to move to Colorado.
Sunday: Alcalde is arrested in the death of Chase.
