The Brief St. Paul police say a suspect in Monday's triple homicide was arrested in St. Louis County. A 30-year-old St. Paul man was arrested Monday night in Virginia, Minnesota and transferred back to St. Paul. The St. Paul Police Department says a suspect in a triple homicide on Monday has been arrested. St. Paul triple homicide suspect arrestedWhat we know:Police posted to social media just before 11 a.m. Tuesday that a 30-year-old St. Paul man was arrested Monday night in Virginia, Minnesota on suspicion of murder in connection to Monday's triple homicide. On Monday night, St. Paul police said they had a person of interest in custody.