Police investigate at the scene of a homicide on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. Omari Barnes, 35, was shot and killed inside the house early Friday afternoon. | Stephanie Dowell~Sun-Times Media

Pastor Corey Brooks (foreground center) of Project HOOD and New Beginnings Church in Chicago stands amidst a crowd watching police and coroner's officials investigate the scene of a homicide on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. Brooks, who is on a cross-country walk to end violence, was in Gary for an anti-violence rally when the shooting death of Omari Barnes occurred. | Stephanie Dowell~Sun-Times Media

"I'm tired of this ----, man. I swear to God, I'm tired of this ----," said Ronald Goode (left) who is comforted by Pastor Corey Brooks of Project HOOD and New Beginnings Church in Chicago (center right) outside the house where Goode's best friend Omari Barnes was killed on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. Brooks, who is on a cross-country walk to end violence, was in Gary for an anti-violence rally when the homicide occurred. | Stephanie Dowell~Sun-Times Media

Gary Police Lt. Del Stout, (from left) and Lake County Deputy Coroners George Deliopoulos and Elias Kavourinos work at the scene of a homicide on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. Omari Barnes, 35, was shot and killed inside a house (background) in the early afternoon Friday. | Stephanie Dowell~Sun-Times Media

Arnetta McGee (center) talks with Lake County Deputy Coroners George Deliopoulos (left) and Elias Kavourinos as police investigate where her son Omari Barnes was shot and killed in a home on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. | Stephanie Dowell~Sun-Times Media

Omari Barnes in 2011. | Provided Photo~Sun-Times Media ptmet

Pastor Corey Brooks (foreground center) of Project HOOD and New Beginnings Church in Chicago stands amidst a crowd watching police and coroner's officials investigate the scene of a homicide on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. Brooks, who is on a cross-country walk to end violence, was in Gary for an anti-violence rally when the shooting death of Omari Barnes occurred. | Stephanie Dowell~Sun-Times Media

Gary Police Lt. Del Stout, (from left) and Lake County Deputy Coroners George Deliopoulos and Elias Kavourinos work at the scene of a homicide on 19th Avenue in the Tarrytown section of Gary, Ind. Friday July 13, 2012. Omari Barnes, 35, was shot and killed inside a house (background) in the early afternoon Friday. | Stephanie Dowell~Sun-Times Media