first off that is messed up!
heres the deal on 911 calls to your house.... when you call 911 for the police they do not need a search warrent... this is becasue you are inviting the police over to your place and yes they are going to come in and look around...
i knew a couple and they had a big ol knock down drag out... one of them called the police... and you know the police show up 2 3 hours later... well by that time the couple had already calmed down and left to go get drunk at the bar... well they forgot t cancel the call to 911, and the police came and no ansewered the door and the cops kicked in the door and conducted a search to find them.... when the couple came home they had yellow letter explaining what went down... and if they found a grow op ha ha well!!