A Lyndonville woman, who was arrested as part of an investigation into a Caledonia County homicide, has pleaded guilty to a charge of illegal possession of a shotgun. Heather Megaro, 42, admitted in U.S. District Court that she had a 12-gauge shotgun on March 4 while being a person that was an unlawful user of and addicted to a controlled substance. The ATF said they were asked to assist State Police and the Vermont Drug Task Force concerning the fatal shooting of Vincent Keithan, 44, of St. Johnsbury, outside NVRH on March 1. As part of the Vermont homicide investigation, authorities obtained a search warrant for Megaro’s trailer at 800 Lily Pond Road in Lyndonville, the ATF said in court papers. Special Agent Tam Vieth wrote multiple firearms, including the 12-gauge shotgun and a .223 caliber rifle, were concealed in a bedroom closet during the March 4 search. Also seized were 6.5 grams of suspected fentanyl, 1.8 grams of suspected heroin and 0.4 grams of presumed cocaine. Two witnesses uncovered that Megaro used heroin/fentanyl and crack cocaine on a regular basis.