A 23-year-old Vassalboro man has been charged with aggravated assault after his infant son was hospitalized with serious injuries, a state police spokesman said. Dylan J. Wood was arrested Saturday and taken to the Kennebec County Jail, Stephen McCausland, spokesman for the Maine Department of Public Safety, said in a Friday morning news release. [Subscribe to our free morning newsletter and get the latest headlines in your inbox] Wood is accused of assaulting his eight-month-old son, who McCausland said has been at Maine Medical Center in Portland since he was injured on Jan.