Two Colorado nonprofit groups called publicly on Attorney General Phil Weiser this week to “root out collusion and price fixing among large landlords” amid national and state scrutiny of software that’s allegedly used by property owners to artificially increase rental prices. The nonprofits — law firm Towards Justice and the housing group Community Economic Defense Project — said Wednesday on the social platform X that companies that manage thousands of apartments in Colorado have been accused of price-fixing in lawsuits and investigations elsewhere in the United States.