The owner of the flat, which was rented out to a student, entered this flat as the main gate was unlocked. On entering the flat, he found two bodies, one male and another female, lying in a pool of blood.
He immediately called the police and did not disturb the scene of occurrence. The Investigation officer, on examination of the scene, found two sharp knives lying near the bodies and also noticed the neck was slit in both the bodies.
Meanwhile, the forensic team was also called in. The suicide notes were recovered from the pockets of each body.
The clothes were intact on both the bodies. Both the victims belonged to the same state and I.O revealed that the girl had visited her friend on this fateful day who otherwise used to stay in another locality of this city. CCTV footage recording also confirmed her entry details in this flat.
Who among the following is authorized to opine on the cause of death?