After the fatal attack on a 25-year-old at a Christopher Street Day meeting in Münster, the suspect has to be remanded in custody.
The magistrate decided on Saturday.
The 20-year-old is accused of bodily harm resulting in death, according to police and prosecutors.
The young man was arrested on Friday.
He has not yet commented on the allegations, it said.
The 20-year-old is said to have insulted several women at the CSD meeting on August 27 with the words "lesbian whore" and approached them threateningly.
The 25-year-old asked him to refrain from the insults.
According to the investigation, the perpetrator suddenly hit him at least once with his fist.
The 25-year-old went down and hit his head on the asphalt.
He was taken to hospital, later placed in an induced coma, and died on Friday morning.
The alleged perpetrator had fled but was caught on Friday.
His nationality was initially not finally clarified.