The jury at Lincoln Crown Court heard that the teenager stabbed Marta Bednarczyk at least 143 times at a terraced house in Wellingborough, Northamptonshire, in March this year.
Yolanda Briggs (pictured), 52, from Boston, Lincolnshire, pleaded guilty to misconduct in a public office and was given an eight-month sentence at Lincoln Crown Court on Friday.
Burglar Owen Blades, 27, has been jailed for life at Lincoln Crown Court for the murder of John Connolly, 69, in his own home just two days after his release from prison,