"He stabbed her to death at a small gathering in Huntingdale and was sentenced to life with a 14 year minimum.
Hart's 14 year minimum term was due to expire in mid 2015 - little did he know, detectives were re-investigating*the 1994 Bicton rape.
In 2015, officers and forensic scientists using new technology got a match for Hart's DNA on a small piece of blue fabric, extracted from the victim's underwear.
With this new evidence, Hart was charged in October 2015 with burglary and commit, two counts of aggravated sexual penetration without consent, two counts of attempted aggravated sexual penetration without consent and stealing."
http://www.watoday.com.au/wa-news/m...ver-cold-case-perth-rape-20170609-gwo1ce.html
There is a new technology DNA testing that is to do with pubic hair. Apparently the main problem in the past has been that in most cases the perpetrators pubic hair didn't have roots as it was 'shedding' hair and partly degraded.
One element that doesn't degrade is bacteria.
Females have on average 76 sorts of bacteria and males 73.
The bacteria mix is like a microbial fingerprint maybe this is how Hart got nicked and KK and CG got linked.
Another reason for pursuing this line of research is that perpetrators have been outwitting police by being more forensically aware wearing condoms and taking them away to dispose of else wear etc.