A Kansas City man was sentenced to 20-years in prison Wednesday for his role in the fatal home-invasion robbery that claimed the life of Brian Ulmer last year.

Xavier Johnson was one of five people charged in the case.

Prosecutors say he has agreed to testify against his co-defendants.

Officials say Johnson, Kasey Hall and Elijah Picket entered Ulmer’s home to rob the occupants last August. Witnesses say when the gunman threatened one of Ulmer’s children, he tried to intervene and was fatally shot. Two other men were charged with leading the trio to Ulmer’s home near 16th and Jules.

Johnson pleaded guilty to second-degree murder May 15. Sentencing is scheduled July 31 for Hall, who also pleaded guilty. Pickett is scheduled for trial in January.

The other two defendants, Camareo Goodwin and Felix Turner, were charged with murder and attempted robbery. Their cases are pending in Buchanan County Court.