An outside campaign group has admitted to a violation in a Garfield County Commission race, but an advocacy organization says weak state laws and enforcement make it unlikely that some political-spending mysteries surrounding last fall’s election can be solved.

The Aurora-based Colorado League of Taxpayers this week admitted to violating campaign finance laws by failing to file an electioneering communication report last fall. Colorado Ethics Watch had complained to the Secretary of State’s Office about the violation, which pertained to the group’s mailings criticizing Democratic commissioner candidate Steve Carter.

The group, set up by Republican activist Scott Shires, also revealed it spent about $2,400 for the mailings. At $50 for each day the report has been delinquent, the organization faces a possible maximum fine that could top $9,750.