Keira Knightley as Loretta McLaughlin and Chris Cooper as Jack MacLaine in Boston Strangler. Photo: 20th Century Studios
Keira Knightley as Loretta McLaughlin and Chris Cooper as Jack MacLaine in Boston Strangler. Photo: 20th Century Studios

Keira Knightley, Boston Strangler and the 'cathartic' tale behind the misogynistic killer