This undated family photo provided by Damon Stewart shows 15-year-old Hadiya Pendleton of Chicago. She was shot and killed Tuesday, Jan. 29, 2013, in a Chicago park as she talked with friends, by a gunman who apparently was not even aiming at her. She had performed in President Barack Obama's inauguration festivities. (AP Photo/Courtesy of Damon Stewart)

Hadiya Pendleton

Cleopatra Cowley-Pendleton weeps in the arms of her family and friends after a news conference Wednesday at Vivian Gordon Harsh Park in Chicago, where her daughter, Hadiya, was killed Tuesday afternoon. | Jessica A. Koscielniak~Sun-Times

Chicago Police Supt. Garry McCarthy speaks at a news conference Wednesday at the park where Hadiya Pendleton was shot to death. An $11,000 reward is offered for information leading to the killer. | Jessica A. Koscielniak~Sun-Times

Hadiya Pendleton's mother, Cleopatra Cowley-Pendleton (center), Kimiko Pettis (left) and Kendra Tate walk to their car Wednesday after a news conference at the park where she was shot to death. | Jessica A. Koscielniak~Sun-Times

Chicago Police Supt. Garry McCarthy talks to Nathaniel Pendleton and his son, Nathaniel Pendleton Jr., before a news conference Wednesday at the park where Pendleton's daughter, Hadiya, was killed. | Jessica A. Koscielniak~Sun-Times

Cleopatra Cowley-Pendleton is supported by family and friends as she arrives at a news conference Wednesday at the park where her daughter was shot to death Tuesday afternoon. | Jessica A. Koscielniak~ Sun-Times

Cleopatra Cowley-Pendleton weeps in the arms of her family and friends after a news conference Wednesday at Vivian Gordon Harsh Park in Chicago, where her 15-year-old daughter, Hadiya, was killed Tuesday. | Jessica A. Koscielniak ~ Sun-Times

Chicago Police Supt. Garry McCarthy speaks with Cleopatra Cowley-Pendleton, mother of Hadiya Pendleton, before a news conference Wednesday at the park where Hadiya was killed Tuesday. | Jessica A. Koscielniak~Sun-Times

Nathaniel Pendleton shows off a picture of his daughter Hadiya following a press conference at Vivian Gordon Harsh Park in Chicago Wednesday January 30, 2013, where 15-year-old Hadiya Pendleton, was shot and killed a day earlier. An $11,000 reward is now being offered for information leading to the arrest of Hadiya Pendleton's killer.

Kendra Tate, aunt of Hadiya Pendleton, wipes away tears at a press conference at Vivian Gordon Harsh Park in Chicago Wednesday January 30, 2013, where 15-year-old Hadiya Pendleton was shot and killed a day earlier. | Jessica A. Koscielniak ~ Sun-Times

A teen shows her boot that was hit by shrapnel. | Richard A. Chapman~Sun-Times

A teen shows her boot that was hit by shrapnel. | Richard A. Chapman~Sun-Times

Community members and police listen as Chicago Police Superintendent Garry McCarthy speaks at a press conference at Vivian Gordon Harsh Park in Chicago Wednesday January 30, 2013, where 15-year-old Hadiya Pendleton was shot and killed a day earlier.

Cleopatra Cowley-Pendleton, mother of Hadiya Pendleton, weeps in the arms of her family and friends following a press conference at Vivian Gordon Harsh Park in Chicago Wednesday January 30, 2013. An $11,000 reward is now being offered for information leading to the arrest of Hadiya Pendleton's killer. | Jessica A. Koscielniak ~ Sun-Times

Chicago Police Superintendent Garry McCarthy speaks with Cleopatra Cowley-Pendleton, mother of Hadiya Pendleton, before a press conference at Vivian Gordon Harsh Park in Chicago Wednesday January 30, 2013, where 15-year-old Hadiya Pendleton was shot and killed a day earlier. An $11,000 reward is now being offered for information leading to the arrest of Hadiya Pendleton's killer. | Jessica A. Koscielniak ~ Sun-Times