A MELBOURNE man who punched and shook his newborn son to death was a placid, family man driven to his violent outbursts by a psychiatric disorder, a court was told today. Douglas Paul D'Aloisio, 31, of Lilydale in Melbourne's outer-east, killed six-week-old Jackson Bailey D'Aloisio in February last year, after bashing him up to three times a week from when he was less than one month old. He pleaded guilty to manslaughter in the Victorian Supreme Court and maintains the support of his wife and childhood sweetheart, Sandra. The couple have a surviving three-year-old son. During a pre-sentence hearing today,...