It remains unclear whether the Larimer County District Attorney's Office plans to do the same.

Boulder DA Stan Garnett announced his decision via Twitter this morning, and a spokeswoman said prosecutors in Colorado are obligated to drop cases if they don't think a jury may convict. Garnett's decision is effective immediately.

The voter-approved Amendment 64, which legalized small amounts of recreational marijuana for adults, takes effect early next month. So even though pot-possession today remains illegal under state law, potential jurors are likely to take the impending change into consideration, Garnett's spokeswoman said.

"If you don't believe you can get a jury to convict, you have an ethical obligation to not go forward with a case," said Catherine Olguin, a spokeswoman for Garnett. "He doesn't believe he can get a jury to convict. And one of the standards prosecutors must meet... is that they have a reasonable belief that they can get a jury to convict beyond a reasonable doubt."

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