system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:When and how can you make a citizen's arrest?
gpt
In the US you can make a citizens arrest if someone has committed a crime in front of you, or you have reasonable suspicion that they've committed a felony. It's important to remember that this only extends to the point where you can hold onto the person but you must notify the police immediately, and you can't do any sort of investigative action. You are only serving as an anchor so the person can't get away until the police can take over the situation.

You still hold liability though, so don't be too rough with them, and you better be able to back up your suspicion of why you believe they committed a crime.