From the police angle, it all reeks of self-congratulatory back-patting. We’re led, step by step, through how their case came together: babies at the neonatal unit started dying, but those deaths stopped when Letby was taken off the unit. People started getting suspicious. She was arrested three times, and each time, the police trawled through her house in search of evidence. Eventually, they found some, which, paired with apparently suspicious interviews, saw her charged with murder.