2016 650i gran coupe (electrical issue)

[my650i]

Hello,
I have been having trouble with trying to identify the problem that makes my car have continuous battery discharging. I had someone to take a look at it and he said it was due to the window regulator so I unplug the fuse and the car doesn't go to sleep and continues to discharge. My battery is new so I know that is not the problem and when I arm the car alarm most of the time it will go off randomly. I don't know what to do next and already dump a lot of cash trying to Diagnose. Anybody have any ideas?