Remove a squatter before purchase in Massachusetts

[David Briley]

I've got a possible lead on a property that the owner has abandoned and let fall into foreclosure because of squatters.  I haven't heard the whole story yet as I'm getting in touch with the owner.  I'd like to find a way to get the squatters out of there BEFORE talking to the owner and possible purchasing.  

They've been there for a while and the previous owner couldn't get them out.  Are there a different set of rights I'd have as a new owner? 

Most forums on here are about getting squatters out after purchasing.  I'd like to get squatters out BEFORE PURCHASE.  Any advice?