Some major events in Dr. Jack Kevorkian's assisted suicide campaign:
June 4, 1990: Janet Adkins, 54, of Portland, Ore., becomes the first person to use a suicide machine developed by Kevorkian. Murder charges are dropped when a judge rules Michigan has no law against assisted suicide.
November 1991: Michigan suspends Kevorkian's medical license.
May 2, 1994: Kevorkian acquitted of assisted suicide.
March 8, 1996: Kevorkian acquitted of two assisted suicides.
May 14, 1996: Kevorkian acquitted of two assisted suicides. A judge had dismissed murder charges against him in the same deaths.
June 1997: Kevorkian accused of assisted suicide. Judge declares a mistrial.
Sept. 17, 1998: Kevorkian videotapes the injection death of Thomas Youk, shown two months later on CBS-TV's "60 Minutes."
Nov. 25, 1998: Kevorkian charged with murder, assisted suicide and delivery of a controlled substance in Youk's death. Assisted suicide charge later dropped.
March 26: Kevorkian convicted of second-degree murder and delivery of a controlled substance.
April 13: Kevorkian sentenced to 10 to 25 years in prison.