The psychic is, quite literally, the new kid on the block as far a psychics go; his name is Tyler Henry, and apparently the basic cable channel E! is really pushing a TV series featuring him, Hollywood Medium With Tyler Henry. His website describes him thusly:
Mitochondrial DNA is only a small portion of the DNA in a eukaryotic cell; most of the DNA can be found in the cell nucleus and, in plants, in the chloroplast. In humans, the 16,600 base pairs of mitochondrial DNA encode for only 37 genes.
For example, if a hair is left at the scene of the crime, nuclear DNA can only be analyzed if the root is intact. However, mitochondrial DNA can be analyzed from anywhere along the hair follicle, including the shaft. Bones and teeth also contain mitochondrial DNA and can be used in mitochondrial DNA analysis. There are several disadvantages of using mitochondrial DNA typing in forensics in lieu of nuclear DNA markers.