They make

 Noise 

And the door

 Down stairs 

So with that

 There is your apartment door 

You returned

 To the crime scene to see your work Mr

Ima leave

 You extra 

Not to mention

 The poison 

When you're being stalked

 And constantly having your privacy invaded 

I wonder if the

 Neighbor below me ever hear anybody walking around in this apartment when I'm not here 

The demolition

 Was last week maybe he with the clean up crew

And forget

 To tell me 

They must be doing a

 Demolition