NORTHAMPTON, Mass. (AP) -- A jury has been sent back to continue deliberating manslaughter charges against a Massachusetts man accused of killing a 10-year-old boy by driving a speedboat over the kayak the boy was in.

Steven Morse of Westfield has been accused of drinking beer and smoking marijuana shortly before taking his speedboat out on Norwich Lake in Huntington in August 2010. Morse's boat hit a kayak carrying James Adamopoulos and his son, Augustus, of Ludlow. Augustus died.

Judge Daniel Ford sent the jury back to continue deliberations Wednesday after jurors said Tuesday that they had reached verdicts on all but one of the eight charges against Morse.

Morse is charged with involuntary manslaughter, boat homicide by reckless operation while under the influence of alcohol, child endangerment while under the influence and other offenses.