I am so very sorry. What a sad tale, and how horrible that this "roommate" would leave the window open (i.e., deliberately let Sweetie out) when he'd been warned over and over not to do that.

We are praying that Sweetie is safe now and that perhaps she might even come back to you some day. She is such a beautiful girl and looks so full of love! Don't stop looking for her and praying for her.