Tenant has disappeared, unreachable

[Federico Gutierrez]

Lets start with thanks for reading and I didn't think I would have this issue so early.

I have an 8unit apartment building. Tenant in #3 has disappeared. None of her neighbors have seen her (I believe this has much do to with the fact she stole the wallet of #5 and she was caught on camera using #5 credit card on camera)

I've tried to contact her and her mobile phone is no longer in service. Rent is due on the 1st and even thou she submit electronic form to have it automatically withdrawn I doubt she will pay it. 
What do I have to do legally here? She left clothes and pans in her unit but all furniture is gone, fridge is empty. Her neighbor in #5 says she hasn't seen her in a week, I haven't seen her in two weeks. I've tried calling her but I also don't feel its my job to be chasing a tenant up.
Do I wait 3days after rent is due and start the eviction process? Any help here would be great.