Trial of 2 accused in killing officer begins Monday

September 29, 2013 5:31:21 PM PDT
Opening statements are set to begin Monday in the trial of two men charged with killing a Chicago police officer.

Kevin Walker and Christopher Harris are charged with murder in the death of officer Alejandro Valadez.

Valadez was shot and killed while responding to a call of shots fired in 2009.

A third person, Shawn Gaston, is currently serving a 125-year prison sentence for his role in the crime.