Dallas cop mistakenly thinks she is home and kills a man

Heavy.com has a lot of details, including officer’s name, she has only lived there a month, his door was locked and she was trying to use her key to open door and then he opened the door. She actually lives on a different floor. No indication that they had met before or any personal dispute leading up to this.

I am just wondering, if you heard someone trying a key in your lock, would you open the door? Call 911? Did he look through the peephole and see a cop? Did the door have a peephole?

https://heavy.com/news/2018/09/amber-guyger/