IDK=I Don't Know And I refer to LE (law enforcement), since they and Raven are the only ones who actually witnessed the murder scene.
I want to do a little role swapping. Instead of us just sitting at our computers, let's put ourselves in LE's shoes for a minute. We get a call telling us that a husband has dialed 911 saying that his wife's been injured. When we, the police officer, arrive on the scene we start questioning the husband. He tells us that he left to play soccer that night and came home found his wife in an office upstairs with a lot of blood.
Flashing RED LIGHTS would be going off in my head and I would be thinking, "that's a little convenient--a husband out all night and came home to a wife that's been stabbed to death." Then to uncover all the things associated with this case--TOD (time of death) being narrowed down to within 5 minutes of the husband calling 911, financial problems, pending embezzlement court date, knife collecting husband, child unharmed in the next room, no evidence of rape, a computer convenietnly missing, ETC.
Now those RED LIGHTS,to me, would have turned into a bright spotlight on one person---the husband. Being a police officer, I don't have to be impartial, like a lawyer would have to be, I can go off of my instinct and all the many cases with similarities over the years, and after I have eliminated all other persons of interest, I can focus in on one the man who found her dead--her husband.