Sister Wives star Garrison Brown’s death has officially been ruled a suicide. In a statement published on Thursday, April 4, the Flagstaff Police Department confirmed “the case is no longer under investigation” at this time and has been “closed.” Flagstaff PD added, “There was no foul play and it was not a homicide. He took his own life.” Although the investigation is over, the police — and the Brown family — are still waiting to receive the Medical Examiner’s report to confirm whether or not there were any drugs or alcohol in his system when he passed. As OK! previously reported, the late 25-…