Dollars, Diamonds and Death

John Mariner helps a wealth manager, Greg Robertson, buy a large ranch north of Blanco, Texas. Shortly after meeting him, Robertson's private plane crashes on the way to Houston from his ranch. As executor of Robertson's estate, Mariner needs to figure out the circumstances of Robertson's death. As he sorts that out and arranges for a probate of the estate, Mariner becomes embroiled in controversies surrounding Robertson's investment firm, centering on allegations that the firm was operating a sophisticated Ponzi scheme. The FBI launches an investigation into the circumstances of Robertson's death, and they and Mariner find themselves entangled not only in a financial mess, but an illegal diamond operation and domestic squabbles between Robertson and his wife. Murder or suicide?