The BBC's Special Correspondent Judith Moritz explains what we have learned so far this week at the Thirlwall Inquiry.

Lucy Letby injected air into the newborns on successive days at the Countess of Chester Hospital's neonatal unit in June 2016 ...

Lucy Letby injected air into two triplet boys on successive days at the Countess of Chester Hospital’s neonatal unit in June ...

A retired hospital chief has denied he could have prevented the murders of two triplet boys by nurse | ITV News Granada ...

The medical director of Lucy Letby’s hospital denied creating an “atmosphere of fear” that prevented doctors voicing their ...

The former medical director of the hospital where Lucy Letby murdered babies has apologised to consultants “if they felt ...

Tony Chambers led the NHS trust where neonatal nurse Lucy Letby, who fatally attacked babies between June 2015 and June 2016, ...

Police were finally brought in to investigate the concerns in May 2017, although plans were in place weeks before to return ...

The BBC's Special Correspondent Judith Moritz explains what we have learned so far this week at the Thirlwall Inquiry. Produced by Michaela Howard.

Retired orthopaedic surgeon Ian Harvey, 65, was the medical director at the Countess of Chester Hospital when Letby murdered ...

The former medical director of Lucy Letby's hospital, Ian Harvey, is appearing before the Thirlwall Inquiry, giving evidence ...