To that end, U.S. Sen. Ed Markey and Suffolk District Attorney Rachael Rollins have taken aim at “qualified immunity,” which prevents police officers and other government officials from being sued for “discretionary actions” performed in the line of duty. Markey, was joined by Sens. Corey Booker of New Jersey and Kamala Harris of California on a resolution seeking to abolish the decades-old Supreme Court-issued practice.