He also said that someone buzzed him in.
Tailgating is a common ploy used by criminals to get into limited access buildings.
I'm sure there is a clause in her agreement that forbids a tenant from letting in anyone that is not a tenant or vouched for by a tenant.
“She was holding a locking primary acess door open for her dog when a person she didn’t know forced his way past her and refused to show his key or fob to open that door.”
There is no evidence that he forced his way into the building.
Instead, he entered the building where he has an apartment.