An indoor gardening chain would not have made a profit if it hadn't knowingly supplied equipment and advice to cannabis growers, police say.

Today's drug bust of hundreds on mainly cannabis related charges sends a strong message to the illegal drug industry, Police Minister Judith Collins says.

Police have seized cash, drugs, guns, electronic equipment and about $300,000 of watches in an operation targeting secondhand dealers.

Medical researchers have begun to elucidate the complex role of genes in human health.

An accused drug ring leader used Auckland's SkyCity casino to plan P deals and enjoy a "high-roller" lifestyle, police say.

The day he died, Senior Constable Len Snee started work early, jogging past Jan Molenaar's house at dawn to conduct a final reconnaissance.

A police inspector speaking at the inquest into the Napier gun seige said he believed it would end in a suicide or "suicide by police."

A former model and sports cheerleader has been jailed for supplying methamphetamine, or P.