Boy dies week after dad accused of violently shaking, punching 5-month-old

FORT LEE, N.Y. -- Charges have been upgraded against a Fort Lee man accused of violently shaking and punching his 5-month-old son after the boy died Thursday morning.

Yoseop Choi, 38, brought the boy, who was in cardiac arrest, to Bellevue Hospital in New York City last Tuesday. The baby reportedly had a severe head injury and a healing rib fracture.

Authorities believe the child had been assaulted in Choi's Fort Lee apartment, and that Choi assaulted his son on multiple occasions over two months.

Choi had been charged with aggravated assault and endangering the welfare of a child.

He was remanded to the Bergen County Jail in lieu of bail.