Speedboat killer Jack Shepherd is back behind bars - after allegedly assaulting a new partner who complained about his 'coercive and controlling behaviour and assault', it is understood.

Jack Shepherd, 37, was initially sentenced to six years in prison after killing his 24-year-old date Charlotte Brown in December 2015.

Speedboat killer Jack Shepherd is back behind bars - after allegedly assaulting a new partner who complained about his 'coercive and controlling behaviour and assault', it is…

Man found guilty of the manslaughter death of his date in drunken boat trip is returned to jail