Main contribution
Schneps is an American mathematician and, with her daughter Coralie Colmez, co-author of 'Math on Trial: How Numbers Get Used and Abused in the Courtroom' (2013), which examines ten historical cases where mathematical fallacies contributed to wrongful convictions, including Sally Clark's, where a paediatrician wrongly treated two cot deaths as independent events to produce a one-in-73-million figure. The book predates Letby's trial by a decade and does not discuss her case.