Ronnie Chambers Jr. looks at his mother Tahitah Myles (obscured) as she collapses during the funeral for his father Ronnie Chambers, 33, a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW) FOR BEST QUALITY IMAGE SEE:GM1E9AJ160X01 

Ronnie Chambers Jr. puts his head on the shoulder of his mother Tahitah Myles during the funeral for his father Ronnie Chambers, 33, a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW) 

Mourners fill St. Luke's Church of God in Christ during a funeral for Ronnie Chambers, 33, a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW) 

Tahitah Myles (R) is supported by a friend as she collapses while viewing the body of Ronnie Chambers, 33, the father of her son and a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW TPX IMAGES OF THE DAY) 

Shirley Chambers collapses during the funeral for her son Ronnie Chambers, 33, a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW) 

Shirley Chambers pauses in her Chicago living room, next to pictures of her son Ronnie who was recently murdered, in Chicago, Illinois, January 30, 2013, Chambers had four children - three boys and a girl. Now they're all gone. The single mother will bury Ronnie on Monday. He was the last of her children - all victims of gun violence in Chicago over a period of 18 years. Picture taken on January 30, 2013. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW SOCIETY) 

Tahitah Myles raises her hands as she is comforted during the funeral of Ronnie Chambers, 33, the father of her son and a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW) 

Shirley Chambers holds a picture of her son Ronnie at her home in Chicago, Illinois, January 30, 2013, Chambers had four children - three boys and a girl. Now they're all gone. The single mother will bury Ronnie on Monday. He was the last of her children - all victims of gun violence in Chicago over a period of 18 years. Picture taken on January 30, 2013. REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW SOCIETY)