July 31, 2009 5:38 pm Roadmap to the Weekend: July 31-Aug. 2 NBCChicago‘s LeeAnn Trotter highlights some of this weekend’s best entertainment options. Local 1:42 Warrant issued for suspect in murder of Chicago police officer 2:15 Politicians, season ticketholders skeptical on Bears' plans for new stadium 2:09 Former Foxtrot, Dom's employees protest after abrupt closures 3:26 Friday morning weather 0:32 Man shot and killed in ‘exchange of gunfire' with police in Valparaiso identified