Janet Mills launched the commission a month after the Oct. 25 shooting killed 18 people at a bowling alley and a bar.
Wathen said the commission's investigatory process was slowed by Army bureaucracy in obtaining information but that the military remained cooperative.
But the sergeant said law enforcement was stymied at the time because Card refused to answer his door.
There were also communication gaps between the Army and the civilian hospital, the report found, which can be improved in future cases.
The military in its report denied that any brain-related injury was linked to his military service.
Persons:
Robert Card, Janet Mills, Daniel Wathen, Wathen, Robert F, Card's, Mills, ideations, Ben Gideon, Gideon, Cara Lamb
Organizations:
Army, U.S, Sheriff's, Card's Army Reserve, Card, Keller Army Community Hospital, Maine Gov, Maine State Police, Department of Defense
Locations:
Lewiston , Maine, West Point , New York, West Point, Maine