Here is another article but doesn't use the words "another child". I really think he's only charged with committing the crime against Alicia and the wording of the complaint was confusing to reporters. I could be wrong though.
The complaint alleges that on or about August 21st and/or August 22nd Longoria killed Alicia Debolt in the commission of or subsequent to the crime of criminal sodomy, and Longoria is being charged with capital murder. The complaint also alleges during that same time period Longoria engaged in sodomy with a child and Longoria is charged with criminal sodomy.
http://www.wibw.com/localnews/headlines/102341824.html