 A system similar to that of the AMBER alert but is activated when police officer has been killed or seriously wounded and the offender is still at large.Anderson's BLUE alert bill passed the House of Delegates with a 138–0 and passed the through the Maryland Senate with a 46–0 vote.Governor O'Malley signed the bill into law in May 2010, but then moved up its effective date by signing an executive order implementing the BLUE Alert system on June 22, 2010.