As Curt over at Flopping Aces points out, this deal really isn't that hard to understand: In 1998, Reid bought the land, zoned for residential use, for $400,000.
In 2001, Reid sold the land for no profit to a friend, getting a share of the limited liability company that held the property.
The LLC tried to get the land rezoned for commercial use, but was rebuffed by the Clark County Zoning Commission.
The LLC then appealled the decision to the full Clark County Commission and lobbied the commission, going so far as invoking Reid's name to the commission in a public hearing on the matter.
The zoning commission's original decision was then vetoed, and they rezoned the property for commercial use.
In 2004, the property was sold for $1.6 million, netting the LLC $1.2 million profit.
Reid never reported the sale of the property to the LLC, as he is required by law to do.