A Little Rock Colonel serving with Arkansas National Guard troops in Iraq began serving a 90 day jail sentence Saturday. Lieutenant Colonel Fred Raymond "Ray" Sampson pleaded guilty to using his rank to coerce sex from subordinates. Sampson, a married father of four, faced allegations involving six women. Sampson`s wife is expecting the couple`s fifth child. He was charged in July with 24 violations of the Uniform Code of Military Justice and removed from duty in May when the investigation began. On Saturday, he pleaded guilty to 10 counts of conduct unbecoming an officer and a gentleman. He also pleaded guilty to fraternization with enlisted soldiers, adultery, having sexual relations with a subordinate and one count of disobeying an order from a superior officer. He was taken by military police to a military prison at Camp in Kuwait, after the trial.