In a post on Facebook, Rep. Mortensen accuses fellow Republican Kurt Daudt of gathering the information for the complaint and giving it to the DFL to file.
The resolution condemned violence at the U.S. and state capitols and declared support for 2020 election results.
The bipartisan panel's report is aimed at addressing "persistent racial disparities"
The bill now heads to the Republican-controlled Senate.
The chamber passed a resolution Monday saying it'll work to dismantle racism in the state.
The lawmaker in question hasn't been identified.
He has been a lawmaker for 47 years.
The Minnesota House of Representatives has yet to vote on a similar bill.
Rep. Joyce Peppin confirms she won't seek re-election in November.