According to prosecutors, Tuller tied up 47-year-old Michael Demmons, put plastic bags and a pillow case over the man’s head, and kicked him repeatedly.
Demmons shared the apartment on Pier Street with Tuller’s ex-girlfriend, Maria Santos.
On Tuesday, neighbors testified that they heard constant banging coming from the Santos apartment on the night Demmons died.
Santos’s daughter told jurors she had seen Tuller and Demmons together many times through the years.
She said that Tuller often gave Demmons nasty looks, made rude comments, and threatened him.
The defense is expected to begin presenting its case Wednesday morning.