The court on Thursday rejected appeals by Cedric Poore, who was convicted in the 2013 shooting deaths of 23-year-old twins Rebeika Powell and Kayetie Powell Melchor, 33-year-old Misty Nunley, and 55-year-old Julie Jackson during a robbery inside Powell's apartment.
Prosecutors say drugs, money and jewelry were taken from the apartment.
The court rejected claims that included insufficient and improper evidence, illegal search and seizure, and improperly excluded testimony.
Poore's brother, 38-year-old James Poore, was also convicted in the slayings and sentenced to life in prison. His appeal was rejected by the court in April.
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