How so? If you are going to make such claims then you need to provide links that back up your claims. Jane Tanner's statement hasn't been ripped to shreds by any 'independent witnesses'
I replied to a post you made yesterday. This is what I wrote in regards to an abductor theory.
What evidence do you want of an intruder in the apartment? Door was unlocked, intruder walks in picks up Madeleine and walks out. It's as simple as that. They weren't going to hang around touching everything and spitting on the floor etc. There are many crimes where no DNA or any other evidence is left. People disappear all the time and are not found/ or murdered and no one is brought to justice because there is a lack of DNA evidence.
As an example...
The kidnapping and murder of Danielle van Dam
"Authorities say Westerfield crept into the van Dam home through an unlocked side garage door and lurked in the girl's darkened bedroom for an hour before abducting her"
"Westerfield's defense argued that there was no evidence that he was ever in the van Dam household: no fingerprints, no DNA, no signs of a struggle from abduction"
He was guilty based on DNA evidence found in his home/on his clothes.
http://abcnews.go.com/US/story?id=91359&page=1
ETA: Of course had the apartment not been contaminated and then further contaminated when police failed to seal off the crime scene allowing further people into the apartment as well as the dogs then who knows what DNA could have been found.