Is the eviction process necessary in this case?

[Ben S.]

I'm looking to purchase a commercial multi-family property. It's been in foreclosure for a long time, and I was told that the previous owner has no information on leases or financials to provide. I don't believe any of the people currently living in the units have paid anything for a very long time. I don't have a way to determine who, if any, ever had a lease or is just a squatter. Is the normal eviction process still necessary? Or is it still easier to evict normally even if there are other options? I need everyone out as the place needs a ton of work. Thanks.