HARTFORD, Conn. (AP) Connecticut's chief medical examiner says he doubts toxicological tests and genetic analysis of the body of the Newtown school gunman will explain his actions.

According to The Hearst Connecticut Media Group, Dr. Wayne Carver II says an examination of Adam Lanza's brain showed nothing unusual.

He says the testing is a ``fishing expedition.''

Carver says Lanza's brain showed no tumor or gross deformity, though he didn't expect to find a gross deformity.

He says he doesn't expect answers, but will still look.

The toxicology exam could take several weeks. It involves testing body fluids for psychiatric medications or illegal substances.

Lanza fatally shot himself after the Dec. 14 shooting spree.