The judge presiding over the trial of the Indianapolis man accused in the deadly house explosion that killed two people has put the trial on hold. It's so attorneys can prepare arguments on whether he should grant a mistrial because of a miscalculation of a witness who has yet to testify. Attorneys for Mark Leonard say a corrected report on gas flow calculations by David Sheppard of the Bureau of Alcohol, Tobacco, Firearms and Explosives could change their strategy. They say it affects not only the guilt-and-innocence phase of Leonard's trial on murder and arson charges, but also the potential penalty phase. The judge will hear arguments on Thursday. He wants to hear how the corrected calculations hurt Leonard's chances for a fair trial.