Video published of student attack
A newly published surveillance video shows the fatal attack on a young woman after she defended two teenage girls from male harassment - a death that has been mourned with candlelight vigils across Germany.
Daily paper Bild published the video on its website, calling on witnesses, including the teenage girls, to come forward with more information about the attack on the night of November 15 in front of a fast-food restaurant in Offenbach in central Germany.
Tugce Albayrak died on Friday, her 23rd birthday, after her family gave doctors permission to switch off her life support.
She had been in a coma after reportedly being struck in the head.
Pictures of the pretty woman with long black hair and dark eyes have been all over television, social media and newspapers in Germany in the two weeks since the attack.
After candlelight vigils attracted hundreds of mourners in Offenbach over the weekend, about 200 people also came together in Berlin on Sunday to commemorate and pray for the young woman.
The incident involving the girls is not on the video, but witnesses reported that Ms Albayrak stepped in to help after becoming aware of the distressed girls.
The surveillance video of the attack in which she is injured shows an enraged man - identified by Bild as 18-year-old Sanel M who is in police custody - who is held back by another young man as he appears to want to run in the direction of Ms Albayrak. Because the incident happened at 4am, it's dark and many of the people's movements on the video are hard to identify.
At some point, Sanel M appears to hit Ms Albayrak on the head - while the other young man is still trying to protect her - and she falls on the ground and stops moving.
An Offenbach police spokesman said that no further witnesses had come forward since the release of the video.
"We are still hoping that the two teenage girls will get in touch with us," says spokesman Ingbert Zacharias, adding that an autopsy of Ms Albayrak would be performed to determine the cause of death.
Ms Albayrak, a German-Turkish university student who wanted to become a high school teacher, has been lauded by many as a hero for protecting the teenage girls, and more than 130,000 people have signed an online petition asking the German president to posthumously award her a medal for her courageous behaviuor.
"I painfully miss my daughter and her smile," Ms Albayrak's father told Bild. "We hope that her body will be released (by the authorities) Monday, so that we can bury her."