Trying to Evict a roommate?

Hello, I’m Jason, and I live in Virginia, and I have a Tenant and Landlord question. I had to evicted my roommate back in February 2013, because she was causing problems in the neighborhood. I am on the lease and she is not on the lease at the apartment complex, but she was living there. I gave her an Eviction Notice and she had 30 days to move out. But, in June of 2013 she moved back in, even though I did not want her to move back in. She has been staying for 32 days now and the Property Manager at the apartment complex wants her out. So my question is, do I have to serve her another 30 day Eviction Notice, or can I just tell her she has to leave now? And also can I just put her belongings out NOW? Because the Property Manager said that she is Trespassing. And again, I live in Virginia.