Charge one tenant or all tenants for damage?

[Grant Berthold]

I have a unit where 3 people are on the same lease, and there was damage in one of the tenant's bedrooms. I know which tenant caused the damage, as it was caused by their furniture rubbing back and forth in a certain spot.

Each of the tenants gave me a portion of the security deposit.  My question is: when returning the security deposit, do I charge each tenant a portion of the damage? Or just take it out of the deposit of the tenant whose furniture caused the damage?

Thanks for your help!