HOULTON, Maine — The Maine Attorney General’s office has found that Maine State Police Sgt. Chadwick Fuller was justified when he fatally shot 54-year-old John Corneil of Merrill outside a grocery store in Oakfield in 2018. There was a warrant out for Corneil’s arrest when state troopers, including Sgt. Fuller, approached Corneil when he was leaving Oakfield Thriftway supermarket. Corneil was described by the troopers as acting “agitated” and “escalating” as well as making nonsensical statements, according to the report filed by Maine Attorney General Aaron Frey.