No person shall loiter or prowl in a place, at a time
or in a manner not usual for law-abiding individuals under circumstances that
warrant alarm for the safety of persons or property in the vicinity. Among
the circumstances which may be considered in determining whether such alarm
is warranted is the fact that the actor takes flight upon appearance of a
peace officer, refuses to identify himself or herself, or manifestly endeavors
to conceal himself or herself or any object. Unless flight by the actor or
other circumstances makes it impracticable, a peace officer shall prior to
any arrest for an offense under this subsection afford the actor an opportunity
to dispel any alarm which would otherwise be warranted, by requesting him
or her to identify himself or herself and explain his or her presence and
conduct. No person shall be convicted of an offense under this subsection
if the peace officer did not comply with the preceding sentence, or if it
appears at trial that the explanation given by the actor was true and, if
believed by the peace officer at the time, would have dispelled the alarm.