Many years ago, I was arrested for something annoying and dumb. I was separated from the group (several friends) and questioned before we were formally arrested

Many years ago, I was arrested for something annoying and dumb. I was separated from the group (several friends) and questioned before we were formally arrested, getting a coerced confession from me. In court, the confession was thrown out - the police argued that I was not under arrest at the time, but when the judge asked if I was free to go, the police had to say no. That meant I was under arrest, whether or not I was cuffed, whether or not they had read me my rights. It's not slavery because it's legally called slavery. It's slavery because those people are not in any way free to leave.