1842 – Born in Allegheny County, Pennsylvania on the 21st of January.
1873 – In November, Packer was with a party of 21 who left Provo, Utah, bound for the Colorado gold country in Breckenridge.
1874 – On the 21st of January, he met with Chief Ouray near Montrose, Colorado.
1874 – On the 16th of April, Packer arrived alone at Los Pinos Indian Agency near Gunnison.
1874 – Packer signed a confession on the 5th of August. He was jailed in Saguache, but escaped soon after, vanishing for several years.
1883 – On the 11th of March, Packer was discovered in Cheyenne, Wyoming living under the alias of "John Schwartze.
– On the 16th of March, he signed another confession.
– On the 6th of April, a trial began in Lake City, Colorado.
– On the 13th of April, he was found guilty and sentenced to death.
1885 – Packer managed to temporarily avoid punishment again: in October, the sentence was reversed by the Colorado Supreme Court as being based on an ex post facto law.
1886 – On the 8th of June, Packer was sentenced to 40 years at a trial in Gunnison.
1899 – On the 19th of June, Packer’s sentence was upheld by the Colorado Supreme Court.
1901 – He was paroled on the 8th of February and moved to Deer Creek, in Jefferson County, Colorado.
– He is widely rumored to have become a vegetarian before his death, reputedly of "Senility – trouble & worry" at the age of 65.
1981 – He was buried in Littleton, Colorado and was formally pardoned of his crimes on the 5th of March.