BROOKLYN - The man accused of a fatal hit-and-run in Williamsburg pleaded not guilty today to manslaughter charges.

Julio Acevedo is accused of killing a pregnant woman and her husband earlier this month in a hit-and-run crash. The couple's premature baby was delivered after the accident, but did not survive.

While witnesses say that the 44-year-old was driving recklessly and fled the scene, Acevedo's family says he's a loving stay-at-home dad.

His lawyer has called the crash a tragic accident.