The bulk of the money was contributed by police associations and law enforcement departments in California, but several corporations, private individuals and anonymous donors also pitched in. Among the corporations were the Dodgers and AEG, owner of Staples Center.
The reward offer was announced by Los Angeles mayor Antonio Villaraigosa and was the idea of LAPD chief Charlie Beck's wife, Beck said at a press conference.
"For those of you that question how so much money was put together: It was amazingly, amazingly easy," Beck said. "When we reached out to members of this community, they gave immediately."
Dorner is the target of one of the most extensive manhunts in Southern California history. He is accused of a killing an Irvine couple and a Riverside police officer in retaliation for being dismissed by the LAPD in 2009. He also is suspected of wounding two other officers.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.