Well, they didn't arrest her right then. They let her "turn herself in" 3 days later. Read they did a toxicology test that is Not being released to the public. Dont know if that was done that night or when she got booked 3 days later. Alcohol or most kind of uppers is gone in 3 days.
If the first day of trial is any indication this case might turn into a nice little dumpster fire.
Apparently these apartments are a place with a parking garage attached where you park on the level you live on. She lived on the 3rd floor. Drove a level too high to the 4th floor. Never noticed any signs in the garage, walked by 16 doors all labeled with numbers starting with a 4 (her floor would've been numbered in 3's), got to this guy's door who had a red welcome mat outside that hers doesn't have and didn't notice that either.
Some question as to whether the door was just unlocked or hanging open a little but she pushed it open it seems, never noticed a table this guy had that she doesn't have, and commenced to shooting.
Dude apparently had his TV on thursday night football and had his laptop open so even if the rest of the lights were off there was ambient light from screens. Screens that would've been likely shut off or at least in a different spot than her place. She claims to have been gone at work for 13-14 hours.
On top of that the only excuse put forward so far is that she was fucking her partner cop and was so ensconced in sexting on Snapchat and talking on the phone with this guy she never noticed a single one of the 20 or so indicators she was in the wrong place the whole time.