A Burlington man has been sentenced to 40 years in prison for the shooting deaths of Michael and Valerie Miller of Webster Plantation. Nathaneal Nightingale learned his fate in a Bangor courtroom Tuesday afternoon. Nightingale was found guilty of manslaughter, not murder, in the death of Michael Miller. He was found guilty of murder for the death of Michael’s wife Valerie. Nightingale was sentenced to 40 years for murder with a concurrent 15 years for manslaughter.A remorseful Nightingale apologized for his actions before the judge issued his sentence.”I’m sorry for the mistakes I made that brought us here today and for the pain I caused everyone involved,” he tearfully told the victims’ family.But the apology did little to ease the pain for the couple’s oldest son on what would have been his mother Valerie’s 49th birthday.”No forgiveness right now and probably never I don’t think I could.”Eventhough the jury’s verdict found one of the homicides unintentional, the state had hoped for 60 to 65 years. The defense recommended 35 to 40.”When you kill to people under these circumstances I think a deterrent message needs to be sent to the public that is not in 40 years,” said District Attorney General Andrew Benson.Nightingale is expected to begin serving his sentence at the Maine State prison in Warren immediately.