Legal question regarding occupied property?

[Mayer M.]

Hey guys, Hopefully someone can help me with this. I bought a foreclosure and apparently there is a tenant inside the property who hasn’t paid rent in quite some time. I’m unable to reach the tenant via phone or email and I want to access the property to get a certificate of occupancy and to document the condition of the property. Can I just go there with the police and if no one answers the door bust it open? How should I go about obtaining access? The property is in Glouster County New Jersey. Thanks!