A onetime Navy diver at Pearl Harbor pleaded not guilty Tuesday to charges that he struck his young son on multiple occasions over a year’s time and then fatally injured the boy on Sept. 18, 2009, by striking him on the head and shaking his body.

Engineman 2nd Class Matthew McVeigh is charged with two specifications of murder, two specifications of manslaughter, and assault in the death of 14-month-old Brayden McVeigh, the Navy said.

A general court-martial trial was expected to take place in early December, but ongoing evidence gathering and scheduling conflicts may push the date back, officials said.