Multiple lawsuits allege inappropriate touching and remarks by a doctor who was paid to leave campus last year.
In an interview with a Greek TV station, Antonios Pagourtzis said he suspects that his son had been bullied. "He pulled the trigger but he is not this person," he said.
A pro-Moscow party is responsible for Austria's intelligence services, raising fears that Western secrets might be leaked to Vladimir Putin's government.
The heat wave has coincided with power outages and the start of Ramadan, when most Muslims do not eat or drink during the day.
Abdul Aziz Sheikh, father of exchange student Sabika Sheikh, says he thought his daughter would be safer in America than in Pakistan.