ST. LOUIS COUNTY, Mo. – A deadly triple shooting in south county last month left two people dead.

A preliminary hearing is scheduled Thursday for 19-year-old Tyler Coleman. He’s charged with second-degree murder, along with drug and weapons charges.    

Investigators say the victims were shot during a sale of marijuana vape cartridges. Last month, a judge denied a request by Coleman to reduce his $500,000 bond.

18-year-old Zachary Hough is also charged in the shootings.