Steve Thomas said under oath that he knew of no blood found on the gown. As far as the DNA, I would think that most young girl's night gowns have a speck of their blood somewhere. The misconception seems to be that there was a visible blood stain suggesting that JBR had worn the gown or someone used it to wipe her the night of her murder.
Q. There was a Barbie nightgown found in the wine cellar where JonBenet Ramsey's body was found, right?
A. Right.
Q. Was there any evidence obtained from that nightgown?
A. Not that I'm aware of prior to departing August of '98.
Q. There was no fiber evidence that you're aware of that was found on that
nightgown?
A. Not that Detective Trujillo shared with me.
Q. Was there any blood evidence found on that nightgown?
A. Not that I'm aware of.
Q. Any hair evidence found on that nightgown, to your knowledge, firsthand or secondhand?
A. Not that I'm aware of.
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"Then the staging continued to make it look like a kidnapping. Patsy tied the girl's wrists in front, not in" the "back, for otherwise the arms would not have been in the overhead position. But with a fifteen-inch length of cord between the wrists and the knot tied loosely over the clothing, there was no way such a binding would have restrained a live child. It was a symbolic act to make it appear the child had been bound."
"Patsy took considerable time with her daughter, wrapping her carefully in the blanket and leaving her with a favorite pink nightgown. As the FBI had told us, a stranger would not have taken such care."
http://www.acandyrose.com/09212001Depo-SteveThomas.htm