THE killer of Darlington grandmother Sybil Sibthorpe was today jailed for life as a judge branded him “a significant danger to the public”.
Lee Grainger senselessly battered the 80-year-old to death close to a house she owned and rented out in the town’s Haughton Road on May 8.
Unemployed Grainger, 41, admitted the pensioner’s manslaughter on the grounds of diminished responsibility at a court hearing last month.
The court heard how he had a personality disorder and was also impaired by “substantial and serious” head injuries suffered in an accident.