The owners of a Burlington, Vermont, skateboard shop are facing federal charges of conspiracy to sell marijuana from their business.John Van Hazinga and Samantha Steady pleaded not guilty Thursday.Steady was released on conditions and Van Hazinga was ordered held pending a detention hearing.An investigation started after witnesses reported that people at the Ridin' High shop sold marijuana to teenagers. Prosecutors say police also responded to multiple reports of disturbances, altercations and violence.They say Van Hazinga sold marijuana to an undercover officer multiple times and Steady made edible products infused with THC sold at the shop. Authorities say they seized more than 50 pot plants and about $67,000.Under Vermont's marijuana law, adults are allowed to grow two mature plants and four immature plants per household.Messages were left with the couple's lawyers.(Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)