In the US, the cops need RAS to handcuff you. The standard was never and is not “until they know what’s going on”. And RAS depends on the current cop knowledge. Even if they had legal grounds to break into your place, what they see in the next ten seconds is still relevant. For example, if someone said you attacked them with a knife, when the cops see no victim, knife, or blood, their legal authority ceases.
Of course it’s all highly dependent on specific details.
(On traffic stops, often they already have RAS. That’s why they pulled you over. So don’t be fooled by other comments about that topic.)
“Law enforcement officers typically have fairly broad leeway to place someone in handcuffs during an interaction if they believe that it’s necessary to protect themselves from harm. In those cases, they can do so even if the person being handcuffed hasn’t been arrested.”
“When a search warrant is being executed”
Handcuffs do not mean an arrest.
