Due process,hummm... If you let a LEO in your house they CAN do a line of sight search! Meaning anything that would GIVE them proable (sp) cause to go get a warrant,such as a pack of Zig-Zag Papers on your coffee table. Top or Bugler Papers wont create probable cause cuz those come with the same brand of tobacco. But Zig-Zags are used for only one thing by most folk.Just an example
in other words if you let them in (grant permission to enter) then ANYTHING that they might see constitutes Probable Cause and gives them the abilty to go get a warrant!!

as Bong said...If you dont know them,arn't expecting them,or won't prove who they are DO NOT LET THEM IN!!!!!!

Rules for dealing with LEO's

Rule No.1 Cops=LIE!!!

Rule No.2 Refer to rule No.1