Key facts
- Dr Stephen Brearey said he "naively" assumed senior managers would act on suspicions about Lucy Letby.
- Seven consultants shared concerns about Letby, leading to a police investigation in May 2017.
- The Thirlwall Inquiry recommended CCTV for all cots and incubators in neonatal units.
- Former hospital leaders Tony Chambers, Alison Kelly, and Ian Harvey were criticized by the inquiry.