 During recross-examination Sims acknowledged that foliage can contaminate blood samples but denied that occurred on the drop of blood on the back gate at Brown's home.The defense then asked if that blood could have been planted by the police since it was collected on July 3rd and Fung said he didn't see it in the photo the defense showed him from June 13.Sims denied the claim and said a different photo of the same gate taken on June 13 shows the blood was already there.