Police came & arrested me & finally gave me a caution along with this before me my friend also did s

Shoplifting
Shopped at primark store & next day went to other store using the same receipt tried to do shop using same receipt to customer services to get refunded & the security guards investigated me & I agreed to paid the money & paid it. Police came & arrested me & finally gave me a caution along with this before me my friend also did same thing as I caught they checked the camera & caught my friend who did same thing & he will work in primark but as he went out they cannot catch him with the receipt can they find whose name is it but I had paid for him as well