No, it wasn't
purely circumstancial evidence, otherwise they wouldn't have got a conviction from that alone.
One of the detectives working on the Beverley Allitt case, did an interview with The Telegraph in which he said that to prove she did commit these murders they had to find something other than circumstancial evidence, and one of the pieces of evidence that tied
her to it, and
her alone was that they found empty vials of insulin taken from the hospital at her home.
To this day, the case of the “Angel of Death” – as child serial killer Beverley Allitt came to be known – still haunts me.
www.telegraph.co.uk