An Army reservist and acquaintance of Robert Card, the gunman responsible for a mass shooting in Maine in 2023, testified on Thursday that he warned about Card’s behavior weeks before the attack occurred, the Associated Press reported.

Sean Hodgson told members of his reserve unit of his concerns with Card six weeks before a mass shooting in Maine that left 13 people wounded and 18 people dead, according to reports. It was the deadliest mass shooting in Maine’s history.