Summary of the day article.

Christian Johnson, the 22 year old member of the O-tray gang in South London, was in a park in “Stockwell” with 20 other guys. Christian, who used his dog to drag down a 16 year old rival before he stabbed him to death, has become the first killer to be caught after officers used a new animal DNA database to place him at the scene.
The gang members surrounded Ogunyemi, known as Seyi, who desperately wanted to escape over a fence, but Christian ordered his dog Tyson and the young man was pulled to the ground. He stabbed him 6 times cutting the aorta, which caused death.
In the tugging Tyson(dog) was stabbed and the police found him in his house by following the blood.
The new technology animal DNA database enables the comparison of the blood from dead Ogunyemi., It shows that the dog was involved in crime.
Prosecutors didn’t have strong evidence that Christian was the murderer, but the new animal database which is only 3 months on the police market, showed that he is.