Jones and Woody were initially arrested Saturday by University of Oklahoma police on unrelated traffic complaints. They were taken to Oklahoma County jail.
Long was arrested by the Oklahoma City police gang unit, and Gaines was arrested in Oklahoma City by Midwest City police Sunday.
The six suspects told investigators they were trying to steal drugs and money from Murray and Butler. The gun and both suspected getaway vehicles used during the crime were recovered by police, Clabes said.
Midwest City police plan to present felony drug complaints against Murray to the Oklahoma County district attorney's office, Clabes said.