Sawajiri told police, 'For the past 10 years, I have used MDMA, cocaine, LSD and marijuana'
Suspect has 'no memory' of the matter, police said
Sawajiri told police, 'I have been using illegal drugs for many years'
Footage taken from the onboard camera of a vehicle showed the suspect near the crime scene, police said.
Suspect fled without paying fare, police said
Wallet in the man's possession contained 60,000 yen in cash, police said
Suspect is a professor in the Department of Applied Physics and Physico-Informatics
Sawajiri said, 'There is no question that it is mine'
Yuzuki Ishizawa, 20, was found collapsed and bleeding on the landing of a stairwell