Is A Security Officer Allowed To Grab Someone They Saw Shoplifting Is A Security Officer Allowed To Grab Someone They Saw Shoplifting And Also Take Their Backpack?

Is a security officer allowed to grab someone they saw shoplifting and also take their backpack? - is a security officer allowed to grab someone they saw shoplifting

Hypothetical: Let's call the person X
X enters a shop. Sign in, packs his bags with some items in the store, and go. Security guard outside, produces ID, grabs X, X, and calls for a step back into the shop. "The safety officer has the right to X) on the suspicion (possible witness theft? Enter and when you try to X run, the security officer grabs his bag and X is dead. It is believed that through the flight safety ?
Also, what rights do X? The Safety Officer is provided with assault and theft charge?

Thank you!