I get the impression that adhering to this advice was where this young lady went wrong. It seems that the Police felt compelled to ensure that she didn't have a WMD concealed in some bodily orifice.
Very many years ago, after a hard day's work in the City of London I was making my weary way to Liverpool St. Stn. when I was stopped by two armed Policemen. Being very much the worse for wear I threw my arms in the air and said "Don't shoot, I'm an unarmed civilian.", their response was "That's the Met, they're right ********, we're City Police; get on home and keep out of the road son.".