A criminal investigation has been launched in St. Joseph in connection with the death of a one-year-old. Police say they are investigating the circumstances surrounding the death of Gage Koelliker, found dead Friday at a home in St. Joseph. Authorities said results of a preliminary autopsy indicate the boy’s death was not an accident. The home where the boy died is also the site of two arrests made Saturday of a man and a woman who are accused of delivering a controlled substance. No charges have been filed yet in connection with the boy’s death.