Staff photo / An investor pitch for Jonathan Frost and Paul Croft's green energy company, Rhino Onward International, describes a proposed a hydrogen plant.
Note: This story was updated Nov. 14 to correct the proposed duration of one of the loans described in Dunigan's suit.
Last year, an Arizona man sent half a million dollars to an investment firm run by the Chattanooga accountant Jonathan Frost with the understanding that within one month he would...
