A and I own a restaurant together. 2 weeks ago some money went missing in the safe, and ever since then A have been accusing me to be the thief. Couple of days after we discovered some money was missing, a portion of the stolen money was in the safe. After we discovered the portion of the returned money, A changed his mind about me being a thief and assumed i “borrowed” money and was “planning to put it back”. I insist on changing the lock to the safe and set up a security camera, but A refused because 1) the store is low on funds and 2) A believes i won’t steal the money again since “i got caught”.
According to A, I am the number one suspect because i am not good with managing my money and i’m always broke. To me, just because i have money problems doesn’t mean i am a thief.

how do i prove my innocence?