True crime writer Scott Bainbridge takes us through the unsolved murder of pharmacist Arthur Blomfield, who was bludgeoned to death in his Auckland store, Mackay's Dispensary, in 1931.

In 1931, just before closing time, pharmacist Arthur Blomfield was bludgeoned to death at the back of Mackay's dispensary on Wellesley Street in central Auckland.

His killer has never been found.

True crime author Scott Bainbridge talks us through the details of this case and shares who the prime suspect might be.

Go to this episode on rnz.co.nz for more details