Book Review: In the Blink of an Eye by Jo Callaghan – a police pairing that breaks the mould

I always like to check out the Theakston’s Old Peculier Crime Novel of the Year awards – the shortlists are full of my favourite mystery authors (Elly Griffiths, Ruth Ware, Abir Mukherjee, and that’s just for starters). This year’s winner was Jo Callaghan’s debut novel, In the Blink of an Eye, which breaks new ground in that there’s a new police officer on the team, and it’s AI. The premise of this novel was just too good to ignore.

DCS Kat Frank has been away from the Warwickshire police on bereavement leave, and her husband’s death is still a bit raw. Her son, Cam, who has just completed his A Levels, has been having therapy, his anxiety over losing a second parent who has a dangerous job never far from his thoughts. So Kat has requested a safe option for her return to work, something less on the frontline. Her boss and mentor Chief Constable McLeish has a surprise in store. He’s signed Kat up to run a missing person’s cold case team that also will be trialling AIDEs (Artificially Intelligent Detecting Entities).

Kat is not happy. She’s an intuitive cop who follows her gut. You can’t solve cases with an algorithm, she declares. Meanwhile the scientist who has designed the AIDE, Professor Okonedo, with her own axe to grind, is sceptical of Kat’s skills and of the police in general. Reluctantly Kat agrees to the trial, taking on ambitious DI Rayan Hassan and shrinking violet, yet empathetic, DS Debbie Browne. Okonedo introduces AIDE Lock, a bracelet-type band that you can talk to like Siri, and which can whip up facts, statistics and probabilities in seconds. In holographic form, it’s remarkably like a person.

With hundreds of cold cases to chose from, Lock determines that recently missing young males will be more easily found. But Lock and Kat disagree over which. Kat’s preferred case is Tyrone Walters, a high-achieving young black man from a deprived area. Lock prefers Will Robinson, a young white male not much older from a wealthy home. According to Locke, statistics suggest the Robinson case would be easier to solve because he’s white. Kat is appalled as this racial bias and has a feeling that Tyrone has been a victim of foul play..

Ultimately, Hassan suggests the trial review both cases, and Professor Okonedo assures Kat that Lock can “perform the functions of many officers in just a fraction of the time”. This makes Kat only bristle more, but she reluctantly agrees. If only the team realised that what starts out as a test, a case chosen by statistics versus one chosen by gut feeling, will converge into a single case that is still active.

Picking up her briefcase, Kat paused at the door. She needed to leave her new team with something more motivational than her obvious irritation. ‘Remember, less than one per cent of missing people turn up dead, so we still have a good chance of finding both boys alive.’

‘Just to clarify, that figure represents one per cent of all the missing,’ said Lock’s voice from her wrist. ‘Only four per cent of adults are still missing one week after being reported, which is the category that Tyrone and Will fall within. So, in actual fact, there is a twenty-five percent chance that both boys are already dead.’

This really was an edge of the seat read, as woven into the narrative are scenes from the point of view of someone who has been kidnapped, drugged and immobilised. The clock is ticking and we can only hope that Kat and Lock will sort out their differences enough to solve the crime and save the missing lads. While Kat is learning how to manage Lock and use its obvious skills – downloading data, scanning social media for clues, extrapolating info, etc. – Lock is learning too. And it needs to, particularly with reading body language and developing social skills.

This makes the book really interesting as it takes time before Kat and Lock gel enough to be useful together. For a lot of the time they’re the angry cop and the irritatingly rational cop. Slowly, Kat’s team start to come into their own: Hassan in spite of his confident manner has a softer side and stuff going on at home, while Browne has a big problem to deal with, but fortunately Kat has enough patience to bring her out. Although mostly Kat is on edge, drinks too much and tends to fly off the handle.

It will be interesting to see how Kat and her officers, as well as Lock, evolve over the course of this series – there’s already a second book, Leave No Trace, plus a third to be published in April next year. Quite the feast. Whatever your thoughts on AI, In the Blink of an Eye illuminates it in real-world scenarios. Jo Callaghan has done a lot of research on the subject and how she imagines AI in a policing environment is fascinating. It’s a four-star read from me, and I can’t wait for the TV series. It would be a cracker.