first detention or maybe not!

Dovid Grosh was walking in the hallway when suddenly r. reiber came and said, "Whoever is walking should come here now". So Dovid grosh and some  other kids went to him and he said "you have fifteen minutes detention and you have to come to me after class". Dovid and some other boys waited after school and went to him after waiting for five minutes until he came and he brought Dovid and the other boys to his class and he didn't say to go to detention to r. zalmanov. So in short they didn't. Nothing pretty much happened to them. They're innocent! So it wasn't really counted as detention.