John Walsh will be sworn in Tuesday as Denver's next district attorney, taking the lead of the largest prosecution office in Colorado. Why it matters: The start of his tenure marks the end of the Beth McCann era but signals Denver's progressive policies on crime will continue.

Denver's new district attorney, John Walsh, is questioning a city council measure passed this week that would remove limits on needle exchange programs. Why it matters: Just as he steps into office, Walsh's stance on one of the city's most controversial topics sets up a potential clash with the city council's progressive bloc.

Denver Mayor Mike Johnston still needs to sign off on the changes after they were approved by city council Monday night.