Police were able to go into such fine detail using HD CCTV they were actually able to literally see the whites of the criminals eyes. As more convictions are held up after the London riots using CCTV evidence. This is by far the best example yet.
http://uk.news.yahoo.com/cctv-snares-cross-eyed-arsonist-172421515.html
“Despite covering his face, officers combing through CCTV footage spotted Burls, of Purdon House, Peckham, because of his distinctive crossed eyes.
The 23-year-old originally denied the offence, but was jailed for a total of eight years at Inner London Crown Court after pleading guilty on January 30 to two counts of arson being reckless as to whether life was endangered, and one of burglary with intent to steal at Iceland in Rye Lane, a court official confirmed.”