I can understand the reactions of the family. Our instincts are to protect family above all else. A father seeing his son tackled (especially when unexpected) would provoke some aggression the majority of the time.
Which is fine, the father can go to jail just as easily. My point was, circumstances arose from his son's actions that circumvented his right to be secure in his home.
There are a ton of exceptions, so many even the experts have to double-check before providing advice.
Case in point = the son, once convicted is placed on felony probation with a search clause. He resides with his parents.
If he is allowed free rein within the house (which is usually the case) it is subject to search without warning, day or night (if appropriate) by any peace officer who chooses to do so.
The search can include all closed off areas, even locked drawers if evidence exists the son may have access to said areas.
If there is a "no weapons" clause in the paperwork and Dad is a gun-loving collector, he will need to move the collection to another residence, put them in storage, etc.
Your "rights" are not quite as absolute as most would wish them to be when it comes right down to it, but all of the exceptions were written after-the-fact driven by necessity.