A commentary on Mark Beckner reddit Q&A

• On possible sources of unidentified DNA on JonBenet's clothing: "Manufacturing process is one. Interactions with other people is another. Intentional placement is another. Belongs to an intruder is another. Yes, you can often tell where DNA comes from. In this case, it is small enough that it is difficult to tell. CBI thought it was either sweat or saliva."

• "The suspect is the donator of that unknown DNA, and until you can prove otherwise, I think that's the way you've got to look at it."

• On whether there might have been an intruder the night of the murder: "Most investigators do not believe there was a legitimate point of entry. It is unknown how an intruder may have gotten in. Lou Smit always believed it was the basement window, but we did not agree with him, as the dust and spider web were undisturbed."

I think that one possibility is Jonbenet allowed her killer in voluntarily through the front door. Another possibility is someone like Mr. Cruel figured out a way to get in. He's quite clever.