The difference between resisting arrest and obstruction in Rhode Island is the specific activity being interfered with. Resisting arrest specifically targets interference with a lawful arrest — the moment when police are physically taking someone into custody. Obstruction is the broader charge covering any interference with police executing their official duties, including investigation work that is not an active arrest. Both charges can apply to the same incident if the conduct interfered with both an active arrest and broader police work. Defense work often focuses on whether the conduct actually rises to either charge and whether the underlying police action was lawful.