Pennsylvania State Police are trying to figure out what killed a 7-month old infant in Waterford on Friday. Police say a 30-week old baby boy was found dead in his crib by his mother sometime between 5:30 and 10 o`clock in the evening. Erie County Coroner Lyell Cook completed an autopsey on the baby yesterday. Cook says the baby was neither strangled nor beaten. Cook is holding off any ruling on the baby`s death until the autopsey results are completed. He says that could take up to 3-weeks.