Dion and Jennifer Longworth were killed in the 2012 blast in the Richmond Hill subdivision.
They lived next door to Monserrate Shirley. They were trapped inside their house when it caught fire. Firefighters and police officers tried to pull them out of the burning house but it collapsed before they could.
Dion, 34, worked at Indy Audio Labs. Jennifer, 36, was a second grade teacher at Southwest Elementary.
The fathers of both Dion and Jennifer were in court June 8 during opening statements.