Can I be held liable for theft as an associate if it wasn't my fault?

Hello. I was curious about something. I was told there was theft during a shift of mine in a tiny,yet very popular store. I didn't see it and try my best to watch for those things. I didn't steal anything and my boss mentioned she knows this. I can only conclude that it occurred during a time when the store was full to the brim and I was assisting another customer. Can I be liable for the thefts even though I didn't steal anything and it wasn't due to my not being a good employee. Thank you.