A: Ummm ... It's not.
It's really not.
In fact, I can't think of any two things more different than blood and ice cream. When bleeding, the last thought on my mind is "Gee, I could go for some ice cream. That would be swell."
When eating ice cream, the last thing I think about is blood. That would sort of ruin the enjoyment of my delicious treat.
Why would you even ask that question?
Yes, I see, there is a lot of blood on that ice cream cone. Yup, that is pretty unusual.
Where did you get it?
Don't remember, huh? Some nice man handed it right to you.
Stan, I know that you're new to Homicide, but you do realize that we're in this park as part of a stake-out, right? That we're looking for a serial killer the press have dubbed the Double Dipper? That he's called that because he kills his victims in an ice cream truck and then uses their blood as a topping for soft serve cones that he leaves behind as his calling card, as a way to taunt the police?
I doubt he's ever handed a cone directly to a cop before.
But, then again, we've never made anyone detective because they won a raffle.
I guess it's not your fault. These kind of things are to be expected when you allow a novice on the force solely to cover budgetary - For God's sakes, Stan, stop eating the cone!