Eviction question in MN

[Brandon Grimes]

So I have an interesting situation.  I am currently trying to buy my first rental property, which is currently occupied, during the home inspection we found human feces on the floor and walls in two bedrooms and the hallway.  I initially was just going to assume the lease and keep the renters but asked the current owners to ask the current renters to leave for breach of lease before I purchase the home.  It states in the current lease that the property is to be kept in a sanitary condition at all times and I can't really thing of anything more unsanitary.  

The problem is, the owner sent a message to they're lease agent, to ask the current renters to move out for breach of the lease and the leasing agent took it upon herself to tell the renters to clean it up and the lease would be honored.  The owners then sent a 2nd message to the leasing agent and she emailed back saying they don't have grounds to evict the current renters.  

The owners are very nice people and they'd prefer not to go to battle over this but what would be the next steps.  Do we hire a attorney?  How do I set this leasing agent straight?  Doesn't she work for the owners?  Who is she to just do what she wants?  I feel kinda helpless since I don't owner the property yet, just trying to get rid of the current renters.

I thought about just buying it with the renters and then me getting rid of them but if they have it cleaned up by closing and I assume the lease I would also assume I would have to grounds for eviction at that point.

This is an interesting foray into my first rental property.....any help/advice is appreciated.  Thank you.

Brandon