Desmond Turner, 31, agreed to have his case heard by Superior Judge Robert Altice, rather than a jury, in exchange for prosecutors dropping their request for the death penalty, The Indianapolis Star reported Monday on the opening day of Turner's trial.
Turner was charged with first-degree murder in the June 2006 deaths of four adults and three children. It was the city's worst mass killing.
Turner allegedly shot the seven in an unsuccessful search for a safe containing cocaine and cash rumored to be kept in a house in the neighborhood, Marion County Prosecutor Carl Brizzi said.
An alleged accomplice, James Stewart, 22, is to be tried on first-degree murder charges in December. Turner and Stewart have denied any involvement in the killings.