Man charged in Concord fentanyl overdose death Troy Silva with his daughter Courtney at her wedding in July, a few weeks before his death of an overdose. Published: 4/11/2021 11:00:11 AM Months after a prominent member of the recovery community overdosed, the man accused of selling him fentanyl hours before his death has been arrested. Matthew Colby was arrested on charges of a drug sale with death resulting in late March. Troy Silva, who died in August, was like a superstar in Concord’s recovery community for founding and leading a group centered around meditation at St. Paul’s Episcopal Church in Concord.