Security 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? - security

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 security officer has the right to X) on the suspicion (possible witness theft? Enter and when you try to run X, 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!