A former Grafton day care provider has been found not guilty of injuring a baby in her care.A jury in Worcester acquitted April Grandinetti of assault and battery on a child causing substantial injury.The Telegram & Gazette reports the 40-year-old mother of four wept after the verdict Tuesday. She had maintained her innocence and testified in her own behalf.The boy's parents didn't comment.Prosecutors alleged Grandinetti injured then-6-month-old Adam Kopoyan in 2012. He was rushed unresponsive to UMass Memorial Medical Center from her home. Doctors said he had a severe brain injury, bruises on his scalp and shoulders and retina bleeding. Prosecutors said he is blind, unable to talk or walk, and has developmental delays.Grandinetti's lawyer said he feels "great sadness and concern" for Adam, but there's no proof Grandinetti caused his injuries.