The DNA results do not support Zimmerman’s claim that Martin assaulted him.
Zimmerman claimed that Martin punched him in the nose stunning and knocking him to the ground. Martin mounted him as he lay flat on his back, and started hitting him repeatedly in the face with his fists. Then he grabbed both sides of Zimmerman’s head and began slamming the back of his head into repeatedly into the cement.
When Zimmerman started screaming for help, Martin attempted to smother him by placing his hands over Zimmerman’s mouth and nose.
If this story were true, one would expect to see injuries on Zimmerman’s face and the back of his head, but there are no injuries, with the exception of a scab on the right side of the bridge of his nose and two little cuts or lacerations to the back of his head. These two superficial cuts bled copiously as scalp wounds tend to do.
The blood flow from those wounds is consistent with Zimmerman’s head in an upright position leaning forward and inconsistent with his claim that he was lying on his back.
One also would expect injuries to Martin’s hands, but there is only one small abrasion on the ring finger of his left hand where a ring normally would be worn. (Martin did not wear a ring)
Martin’s only bleeding wound was from the gunshot to his heart.
Now let’s take a look at the DNA evidence.
Left and Right Lower sleeves and Cuffs of Martin’s Shirt and Sweatshirt
No blood detected on any of them.
Martin’s DNA was detected on all of them. There were no DNA results foreign to Martin, with the exception of the left cuff and lower sleeve of the shirt, but the data was insufficient to include anyone due to its limited nature.
Martin’s Fingernail Cuttings
No DNA results foreign to Martin were found.
Note: The absence of Zimmerman’s DNA on the fingernail cuttings and the absence of injuries to Martin’s hands consistent with the beating Zimmerman described, as well as the absence of blood and Zimmerman’s DNA on the lower sleeves and cuffs of Martin’s shirt and sweatshirt leads me to conclude that Zimmerman’s story about Martin almost beating him to death is a lie.
In fact, other than Zimmerman’s story, I do not see any evidence that Martin hit Zimmerman.
He was certainly injured, but there are other possible causes for those injuries.
Martin’s Shirt (ME-8)
Bloodstain A: matches Zimmerman
Bloodstain B: matches Martin
Stain C no blood and no DNA
Bloodstain D: mixed DNA profile likely containing both Martin and Zimmerman
Bloodstain E: matches Martin
Martin’s Hooded Sweatshirt (ME-12)
Blood matches Martin.
Zimmerman’s DNA not present
The only place where Zimmerman’s blood and DNA are present is Martin’s shirt, which he was wearing underneath the hooded sweatshirt.
Bloodstain A is all Zimmerman
Bloodstain D is a mixed DNA sample containing Martin and Zimmerman’s DNA.
Pending review of color photographs of the two bloodstains on Martin’s shirt containing Zimmerman’s blood, I am inclined to believe that they are the result of any of the following:
(1) dripped blood from Zimmerman’s wounds as he leaned forward above Martin’s body either before or after the shot, or
(2) transferred blood from Zimmerman’s hands as he handled Martin’s body.