An investor in Fluid Truck, the Denver-based vehicle rental startup, has accused its founders of masterminding a “corrupt, unlawful and unconscionable scheme” to take more than $11 million from vehicle owners and then file for bankruptcy to get away with their “naked theft.” “Simply put, Fluid Truck is stealing from its vehicle owners to fund its ongoing operations,” says Tim Urban, an entrepreneur in Littleton who is suing on behalf of 100 investors. A spokeswoman for Fluid Truck, Emily Allen, declined to discuss those theft claims. “While we cannot comment on pending litigation, our vehicle owners are our top priority and we continue to focus on addressing their needs and driving success for them,” she said. The company was founded in Denver in 2016 as Fluid Market, an Uber-for-everything app that allowed users to rent a vast assortment of household items and vehicles.