I'll relay a story a friend of mine just told me.
She was at the store and noticed security had detained a person. They were going through a backpack and acussing the person of stealing cans of food. My friend went up to them and pretended to know the person. She then said "I was going to pay for these items, I must've forgot, let's go pay for them now" security reluctantly allowed her to pay for the persons items and let him go.
$22.00, was the cost to feed someone and keep them out of jail.

@mike also friends:
No state in the union makes it legal for private, unsworn "security" people to 'detain' you.

When a rent-a-cop says "you've gotta stop" tell em to fuck off and to keep their hands off you. "Don't touch me! Don't you fucking touch me! Get away from me!" Is what you say

@stripey @mike
They have citizens arrest in the USA and Security guards are citizens aren't they?
"A private person may arrest an offender if the offense is committed in his presence or within his immediate knowledge. If the offense is a felony and the offender is escaping." They also have citizens arrest in the UK and Canada. How do I know? I've arrested people in both Canada and the UK when I witnessed crimes.