One New Zealand police department is using genealogy to track local criminal clans.
Christchurch police are targeting the 10 families with the most prolific offenders - and have taken the unusual step of preparing family trees to help keep track of members and their offending.
One four-generation family of 74 has clocked up 673 offences nationally, costing $2.4 million over five years. One couple, a 53-year old woman and her 52-year-old partner with 70 charges between them, had produced four prolific burglar sons. The eldest, at 26, had 99 offences, mostly for vehicle theft. His youngest brother, 18, was catching up with 71. [Link]