I remember watching Cops on TV and seeing this episode and wondering the same thing (and in a brief online search managed to find it):
http://www.youtube.com/watch?v=xbsbth9cvRk
They are serving a warrant to confiscate the firearms of someone, clearly expecting to run into steroids, and apparently having busted the guy for steroids before based on the guy's comments that they are the same ones taken before.
The attire and looks of the people give the impression it was in the 1980s, and a comment mentions it was 1988. Steroids were misdemeanors and infractions at that time, becoming more serious some years after the baseball scandal I believe.
However possession for sales was probably a felony, and that might be why they were confiscating his firearms, indictment of a felony.
One of the guys in the home is wearing a handgun on his hip in a holster when the warrant is served.
The detective and an officer in the back room have this verbal exchange as part of the conversation:
"Was the one guy..."
"Yeah"
"The one right outside the door?"
"Yeah. He had a pistol on his hip."
"He's going for CCW?"
"No he's..it wasn't..it wasn't concealed. It was in a holster, on his hip."
So both the detective and the officer thought if it had been concealed, even in this private home, it would have been violating some sort of law against concealed carry. But being open carried made it legal. I am not sure what state they are in, and that belief of the officers does not make it law, but is interesting to note.
What police think and what is the law are very different things.
Police charge people with all sorts of things that a DA with more formal legal experience then reviews and who often drops some of them if they don't even potentially match the law.
The term "DA reject" is a term some informally use to refer to this process.
People are arrested for things that violate no law all the time.
Just a year or two entire departments in California were having to re-educate officers on legal open carry of unloaded firearms (now banned) because they were arresting people breaking no laws throughout the state.
And this was a topic widely encountered and part of a political movement. More unique and less frequently encountered scenarios won't have the officers being educated on a large scale, so various arrests and misinterpretations of the law will continue on those issues.
Officers are not lawyers, they have only a minimal education in how the law applies. And that is primarily dealing with locating, securing, and preserving evidence, and conducting investigations.
Lawyers spend years learning about specific areas of law. Officers spend less total time being trained on a much broader range of topics before becoming police officers.
They become more familiar with those laws which they deal with more frequently, but they are far from legal experts. Some take it upon themselves to learn more, but they still are police, and if they had a law degree would be practicing law earning more money.
I know in California that concealed or open carry of a handgun (or other firearm) does not violate the two statutes dealing with concealed handguns nor loaded firearms when done at a private residence, temporary residence (hotel room, campsite), or private business.
Case law clearly has established this, and it even extends to outdoor private property which is not open to the public as defined by state law, which includes fenced in property (but does not include an unfenced front yard in a suburb for example.)
One of the cases that established this was a presumed gang member in Los Angeles, on private property, with a handgun and cocaine concealed on his person, within a fenced in area (with an open fence) of the front yard of a residence.
The officer saw a glimpse of the concealed gun, chased the man who ran into the home, and recovered the firearm and upon searching through pockets discovered the cocaine, and arrested the individual.
The cocaine charge was dismissed as the reason for the search was unlawful, the gun was lawfully possessed on private property, and so the officer seeing it did not give probably cause for the arrest.
Possession of the firearm was entirely legal, loaded and concealed, on enclosed private property.
We are all lucky the court reached that decision, and didn't validate the arrest in order to keep the drug charge valid, seeing the short term intended benefits as is often done instead of applying the law properly.
Otherwise we may have all lost the legal right to have a concealed handgun on private property so the state could give that man the charges he probably deserved.