A newly published surveillance video Monday shows the attack on a young woman who died after defending two teenage girls from male harassment - and whose death has been mourned with candlelight vigils across Germany.
Tugce Albayrak received blows to her head from either a bat or a stone. She suffered a traumatic
brain injury and later fell into a coma. (AP Photo)
Daily paper Bild published the video on its website calling on witnesses, including the girls, to come forward with more information about the attack on November 15 in front of a McDonald's restaurant in Offenbach, near Frankfurt in western Germany.
Student teacher Tugce Albayrak died on Friday, her 23rd birthday, after her family gave doctors permission to switch off her life support once they pronounced her brain dead.
Albayrak had been in a coma after reportedly being struck in the head in the altercation two weeks ago when she was attacked in the park of a McDonald's in Offenbach.
She received blows to her head, from either a bat or a stone. Blurred footage from CCTV cameras captured the moment when she fell backwards, hitting her head on the ground.
She suffered a traumatic brain injury and later fell into a coma.
Police say an autopsy will be performed on Monday to determine the cause of death.
Her alleged attacker, an 18-year-old identified only as Sanel M, from the Sandzak region of southwest Serbia, has admitted attacking Albayrak and is being held in police custody.
On the video footage he is shown with an accomplice, who apparently tried to hold him back as he began attacking the student who had earlier intervened after hearing the screams of two women in the McDonald's toilet who were being harassed.
On Sunday, hundreds gathered to pay their respects on Oranienplatz in Berlin's Kreuzberg district, which has a large Turkish community. Albayrak was Turkish by origin.
Billed as a "civil courage" vigil, people held up photographs of Albayrak, some with slogans and written tributes.
Outside the Offenbach hospital where she died, and where people had been holding a vigil since the attack on her on November 15, they brought flowers and lit candles.
A pianist played Albayrak's favourite songs as friends released helium-filled balloons with farewell messages attached.
A petition that has so far gathered 100,000 signatures has been sent to Germany's president, Joachim Gauck, urging him to award Albayrak the national order of merit posthumously.