But you're not under arrest you're detained
Actual custody has been defined to mean actual imprisonment or physical detention. State v. Schaller, 70 Wis. 2d 107, 111, 233 N.W.2d 416, 418 (1975).
https://scholar.google.com/scholar_c...=4,50&as_vis=1 Line 75 In Custody when the “ability or...