claim: Heath Ledger died before I'm Not There was cast.
evidence: The Himalayan wolf is a proposed clade within the Tibetan wolf -LRB- Canis lupus filchneri -RRB- that is distinguished by its mitochondrial DNA , which is basal to all other wolves including other Tibetan wolves .. mitochondrial DNA. mitochondrial DNA. The taxonomic status of this wolf clade is disputed , with the separate species Canis himalayensis being proposed based on two limited DNA studies .. However , the 50 % likelihood provided by the model on which the study was based provides only weak support for this proposal .