NEW LONDON, Conn. (AP) The state office of the chief medical examiner has performed an autopsy of a man who died after New London police used a stun gun twice in eight hours, but a cause of death won't be known for four to six weeks.

The Day of New London reports that the medical examiner's office did an autopsy Sunday on 31-year-old Lashano Gilbert.

Connecticut State Police are investigating the death of the medical school graduate from the Bahamas.

New London officers arrested Gilbert for an attempted carjacking at about 7 p.m. Friday. City police say they were forced to use a stun gun on Gilbert when he resisted arrest Friday evening and when he attacked officers at the police station Saturday morning.

He died Saturday morning.