One is his x-wife and her bf having their throats slit in an ambush outside the x-wife's home...
Not correct. Police & prosecutors believe ex-wife Nicole Brown answered the door from inside her house, and her killer initially attacked her at the doorstep. Ronald Goldman happened on the scene at that moment and witnessed the crime, and was killed next.
Goldman was not a BF, but rather a waiter where Brown had just had supper. She left her eyeglasses behind, and the restaurant manager sent waiter Goldman to deliver them to Brown at her house, a fatal errand for him. There's no evidence the 2 victims were romantically connected.