A Northwestern University professor and journalism students who spent three years investigating the case of a man convicted in the 1978 killing of a security guard say they have evidence that shows that prosecutors put the wrong man behind bars. But in the quest to prove his innocence, they may have to defend themselves, too.

Saturday morning, a fire-protection system at Police Headquarters, 3510 S. Michigan Ave.. went off in a telecommunications room. The system automatically disrupted telecommunications for about four hours until those services were restored at 3:30 p.m., according to Police News Affairs spokesman Roderick Drew.

Franchezka Velez, 21 had returned from a deployment in Iraq. She was to return to Chicago with the news she was pregnant. But Velez was mortally wounded in the rampage of fellow U.S. Army soldier Nidal Malik Hasan. Also among Hasan's 13 murdered victims was 21-year-old Bowlingbrook Army soldier Michael Pearson.

Armed with a powerful telephoto lens, Michael Wolf captures the unknowing inhabitants of Chicago’s skyscrapers. The voyeuristic project grew out of an ongoing series of cityscape shots, tightly cropped so as to lose all points of reference besides the building’s geometry.

Inside the spartan federal prison cell where a brother of "The Dark Knight" director Christopher Nolan was being held, officials allegedly found tools for a Batman-like escape: 31 feet of rope made from bedsheets, a harness, a razor and a metal clip that could unlock handcuffs.

Moore, who works for a company that installs alarm systems, said he doesn't consider what he and his neighbors did heroic. (No one died.)