Exeter police chief Stephan R. Poulin said the driver of a 2014 Ford Focus, Sarah Arseneau, 21, of Stratham, went off Newfields Road, striking a tree and large boulder.
Striker, a 10-year-old mixed breed, was noticed by a neighbor who called the NHSPCA over concern about his appearance. His ribs were showing, hips protruding and his eyes sunken.
Portsmouth school superintendent Stephen Zadravec said James McKenzie was removed from his position after Portsmouth Police made the department aware of the allegation.