Less than six months after California enacted sweeping legislation scrutinizing the use of peremptory challenges in jury selection, a key lawmaker has introduced a bill to get rid of all no-explanation juror strikes in criminal cases.

Senate Judiciary Chairman Tom Umberg, D-Santa Ana, is proposing to eliminate a complex set of factors a judge must consider to determine whether a lawyer’s attempts to remove a prospective juror without cause is legally valid. Those rules, aimed at weeding out racial, gender and other forms of bias in the jury selection process, were set to take effect in criminal trials next year.