David Rooke admitted false imprisonment and ABH, his son Jamie, 19, to ABH and affray and Donna Rooke to battery.
32 year-old Craig Kinsella was kept in the family's garage and made to scavenge for food from bins.
Craig, who has learning difficulties, was made to work from 7:30 am until midnight and beaten with pick axe handles.
More top news
A police inspector was found with hundreds of thousands of pounds of seized drugs in his home, a jury has heard.
People left their properties in Cottage Beck Road and The Close so an unidentified item found at a property could be accessed
The Explosives Ordinance Disposal team has been called in to an address in Scunthorpe following the discovery