They could have just asked him in the hotel. Did you beat them? No? Ok, girls do you have proof? No? Well, have a nice evening and keep it down because the other guests want to go to sleep. Case closed.
He was accused of assaulting children. At minimum that means you take him to the station, interview him under caution and take a statement. I honestly cannot believe people are suggesting otherwise.
They should question him alright, but not until 4 in the morning!
You question someone as soon as you are able, as you have no idea what might happen in the interim.
Is it about celebrities? I don't know what really happened and what he really did. I don't know how seriously injured the girl was. So if he was really aggressive towards them, he deserved to be brought to the police station right there.
But the way it sounds, they totally harassed him, he got into an argument with them, things got heated and he pushed them. If some teenagers of 13/14 (my son's 14) came to my hotel room in the middle of the night and harrassed me and I was seriously under stress and then when I opened the door they wouldn't run away, but be unregenerate and maybe still verbally fight with me - I might push them in the heat of the moment, too. Of course it's correct that the police then investigates, and that he's punished accordingly, but to me whether the behaviour of the police to take him to the station in the middle of the night was justified depends on what kind of a push it was - at 13/14 you are not really a child who doesn't have huge responsibility in this case if you harrass some person like that. So honestly some kind of push in that situation is not an "assault" to me where you have to be taken to the police station immediately if you can show your papers and everything right there.
To be very clear, it has absolutely nothing to do with who he is. Anyone who assaults children, and that includes pushing them, deserves to be taken straight to the police station and interviewed under caution. Your opinion on what an assault is doesn't matter, pushing a child is an assault. a 14 year old is a child. You can deal with what they did separately, but not taking in a man accused of assaulting children for questioning?