Answer:
Explanation:Their are two evidences that can be used...
(1)CCTV :-security cameras can help to prove he wanted to steal since his reactions can be watched..
(1) other items :-if he bought other items and paid for them how come he forgot to pay for the drinks.
Number of bottles:-it is impossible for one to forget that he is with bottles of drinks..how can he put them inside the bag without remembering to pay?how can he hold the bottles in his hands and not remember he has not paid