Actually I believe LE has said they don't have any video of Missy and the perp's face-to-face interactions. At some point she could have been lured that the perp was a cop as the video of it simply doesn't exist to answer it.
Could they be holding back that info on whether her murder was caught on tape? I want to say in the Mickey Shunick case, LEO didn't give all the details they had on surveillance tape until the perp was arrested.