A US citizen has been released from a Russian prison after serving four years. Robert Gilman, the individual in question, had become severely ill during his imprisonment, according to an advocacy group. Details about his current condition and the circumstances surrounding his release are not provided.

It is known that he was held in a Russian prison for four years and was in poor health. For more information on Robert Gilman's release, readers can refer to the original report from FOX 4 News Dallas-Fort Worth.