Teenage girl sudden death of the classroom, the school teacher without accountability?

On May 20th, changping district, new Oriental foreign language school educations girl Yao Shu (a pseudonym) classroom was found dead, the criminal suspect for the next class at the same level of male classmate Roger wang (not his real name). After the incident, Roger wang was arrested by the police, suspected of murder and stealing. At present, the case has been prosecutors returned to the public security organ for supplementary investigation. Before this, Yao Shu family think autopsy report existence condition, the specific time of death, such as many omissions, many times to the public...