"Brandishing" a Firearm?

I live in a @#$%hole. I live in Echo Park, Los Angeles. My house in on the territorial border between 18th Street Gang (largest gang in Los Angeles) and Mara Salvatrucha 13 - MS 13 (meanest gang in Los Angeles). It's right by Dodger Stadium. My Dad left me a small amount of money, and I decided I wanted to own a house free and clear. So I bought a little house (780 sq. ft.) in the ghetto. I didn't realize how lousy the neighborhood really was until I lived there. I haved since added a gate, cinder block walls, wrought iron bars and doors, motion activated floodlights, cameras front and back, an alarm, and a 115 pound German Shepherd from the pound. I sleep with a police surplus Spanish Star Model B .38 Super under the pillow (no round in chamber) loaded with +P 130 grain Hollowpoints. I keep my boyhood 20 gauge pump action in the closet loaded with four rounds of #3 Buckshot. My Honda Insight has a Makarov 9mm wrapped in the towel tucked up under the front seat. If I am puttering around outside, I keep a .25 Auto in my front pocket, or if it's cold, and I can hide something bigger in a jacket, I keep a Walther PP .32 auto at hand. It's not a nice neighborhood, and I am a tiny man (five foot four 109 pounds). So I was in my front yard, trying to set up some hydroponics to my own organic squash. When two gang members come on an elote man across the street, and start throwing him around like a raggedy Andy doll. An elote man is a man who sells corn on the cob, Mexican style. You can get it with salt, butter, Mexican "foot" cheese, mayonaisse, chili powder, whatever. You can also get Raspado (Mexican Shave flavored ice.). Normally when hot blooded Latins want to beat each other, I stay out of it. Mind your own business is my rule. I figured the elote guy had been late paying his protection money, and was getting a "reminder." Not my problem. Then the guy saw me and started screaming for help. (Senor! Senor! Ayudame, Ayudame Por Favor!) Then I realized something. The guy being beaten went to my church. I recognize him. (I'm Catholic) Damn. He has a gigantic head on tiny shoulders and an odd voice. I had a Walther PP on me. But I assumed being the only white guy in the neighborhood that I am always watched. And I don't want them to know I carry a gun. I am small. They will just jump me and take it off me. So I run into the house, and get my shotgun. I have very long property, and local scum like to hang around my dilapidated garage. I try to scare them off with a pistol and they just laugh at me. I don't scare them with a small pistol. So now I shoo people off with the shotgun. I come back out, and they are still beating the @#$% out of this hunchback Mexican guy. My gate is locked, so I put the shotgun down, step on this cement thing, hop over the fence (I'm skinny, I can move) and land on the other side. Pretty good in flip flops. Didn't caught on the fence. I get up. The gang guys notice. They book down a side road and hop in an old Chevy. I guess even a small hippie looks mean when he has a old High Standard Flite-King Pump Action full size shotgun. We call Amber lights. Police and Fire show up. The cops are more interested in rousting me. Police Chief Charlie Beck is local president of Handgun Control Inc. And his men act like it. They tell me to go back in the house and get my shotgun. I get a big lecture. They run the shotgun serial numbers. It doesn't matter two gang members were rat packing a guy trying to earn a living. LAPD takes my shotgun. They want to "make sure it hasn't been used in a crime." I can pick it up later. Maybe. I am told I am lucky. I could have been charged with "Brandishing a firearm." The cops tell me I can never take a loaded gun off my property. I thought the fact they beat a 50 year old man so bad they broke his collar bone trumped that. I guess not. Oh, and LAPD took the guy's cart. Didn't have a Los Angeles Business Permit. But I thought you could use a gun in defense of others. The cops said that only applied to your own family. Does anyone know the law on this? Does it matter that the guy was in my church?