Black Lives Matter activists protested at the Iowa Capitol Thursday, urging lawmakers to reject a bill that would give Iowa law enforcement “qualified immunity” from most lawsuits over their on-duty actions.

An Iowa State Trooper arrested an 18-year-old at the protest inside the capitol. Witnesses say she asked for the names and badge numbers of two officers. The Des Moines Register reports the trooper who made the arrest wrote in the criminal complaint that the high school student pushed his arm to get his attention.