CHICAGO – Two men circled a park on Chicago's South Side looking for members of a rival gang before one crept up on a group seeking shelter from the rain under a canopy and opened fire, striking a 15-year-old honor student who once made a video protesting gang violence, prosecutors said Tuesday.

New details about the death of Hadiya Pendleton emerged during a court hearing in which a judge denied bail for the two men charged with murder in her death, 18-year-old Michael Ward and 20-year-old Kenneth Williams.

Williams' attorney denied that his client was a gang member, but Cook County Assistant State's Attorney Jennifer Sexton laid out in sometimes chilling detail – much of it, she said, provided by the defendants themselves – of a hunt for rival gang members that ended with a deadly case of mistaken identity.