The three suspects in the south side disaster are expected to face additional charges Wednesday.
A judge will add an additional arson charge against Moncy Shirley, Mark Leonard and his brother, Bob Leonard. The three are already facing 100 charges each.
They are accused of the November explosion that killed two people and destroyed several homes.
All three have pleaded not guilty.
Among the arson charges, each defendant faces two counts of murder in the deaths of Jennifer and Dion Longworth.