Should I open the door if the police knock?

Only if they have a warrant.

 

If they don’t have a warrant and force their way in, then let a judge sort it out.

 

If they are in, just remain silent and comply with any command (sit still) .

 

Do not give them permission to search, even if the situation looks hopeless.

 

Remember that a lawful search is only admissible if:

a)    you give them permission,

b)   the police have a warrant,

c)    “exigent circumstances” exist.

 

To preserve the issue for a judge NEVER agree to a search.