A Yonkers man was sentenced to 20 years in prison Friday for the death of his daughter.Darryl Bolton was charged with beating his daughter, Heaven, to death on her first birthday.Prosecutors say the baby had been ill when her father hit her in the abdomen, fractured her ribs and broke her arm in their Yonkers apartment. Bolton was silent during the sentencing.?I guess we?ll never really know why it happened,? says Defense Attorney George Fufidio.Friends and family of the infant say they are devastated by the death of the child.The child?s grandparents say they are not asking for revenge and are focusing on remembering their young granddaughter.?God bless Heaven,? says Heaven?s grandfather Charles Williams. ?We still have her in our hearts.?To watch additional courthouse interviews, go to Channel 612 on your iO digital cable box and select iO Extra.