The Nebraska Supreme Court has upheld the conviction of an Omaha man sentenced to life plus a minimum of 75 years for a 2010 fatal shooting.

Kevin Watt was convicted in 2011 in the death of 25-year-old Adrian Lessley and the wounding of 33-year-old Jason Marion. Police say Watt used a rifle to open fire on a north Omaha porch.

The 26-year-old Watt said in his appeal that there was insufficient evidence to convict him, improper jury instructions were given, his attorney was ineffective and his sentencing had been excessive, among other things.

On Friday, the Nebraska Supreme Court dismissed Watt’s arguments, but said the 448 days’ credit he received for time already served was improperly applied to his life sentence and should have been applied to his assault sentence.