Aug. 28, 2012. Daniel Murphy tells people he has two Ph.Ds. One is a Ph. D. from Iowa State University. The other is what he calls a small ph.d. – a prison house diploma. Murphy served five and a half years in a maximum security federal prison for trying to grow medical marijuana when he was in his mid-30s. He had worked as an environmental law consultant specializing in Superfund landfill cases prior to his arrest.