Jamal Sealy, who was sentenced to indefinite hospital detention after being found guilty of killing his mother. Image: Met Police A Lewisham man who admitted to fatally stabbing his mother will be detained in hospital indefinitely after the conclusion of his trial at the Old Bailey yesterday (Friday, January 8). 31-year-old James Sealy from Lewisham Way in South-East London pleaded guilty to manslaughter with diminished responsibility at the Old Bailey Friday, and was sentenced to an indefinite hospital order under Sections 37 and 41 of the Mental Health Act. Police working on the case described it as extremely sad as further details from the fatal stabbing emerged.