How did Karis gaining die?

Karis Haining was hit in the head by a book by Heather Buchan, otherwise known as “Hetty“. Heather Buchan (Hetty) is on the run from the police while Karis Hainings remains stay stored in the Glasgow morgue, Karis’s family are distraught and are trying to find a lawyer so they can sue Heather Buchan for the Murder commuted. JUSTICE for Karis Haining