In addition, his new criminal division chief, Craig Sims, said he is reviewing about 50 more cases. Unless there are "out of the ordinary circumstances," Sims said, the office doesn't intend to file charges for marijuana possession.
"We're not going to prosecute marijuana-possession cases anymore," Holmes said Thursday during a public interview as part of Town Hall's Nightcap series. "I meant it when I said it" during the campaign.
Seattle voters approved Referendum 75 in 2003, making marijuana the lowest priority for local law enforcement. City records show that Carr still prosecuted many cases.
Holmes' policy change comes amid several state-level efforts to decriminalize or legalize marijuana.
A ballot initiative filed Monday would legalize adult marijuana possession, manufacturing and sales in the state. The Legislature is also considering two bills to decriminalize and regulate marijuana, or to make it legal in the state.
The drug would remain illegal under federal law.