Boston Strangler: Carrie Coon, Keira Knightley on Real-Life Story

The duo, who star in Matt Ruskin’s "Fincher-esque" thriller, also discuss their theories on the Boston Strangler and whether multiple parties were involved or not.

Boston Strangler' True Story: Who Is Daniel Marsh?

O Estrangulador de Boston': Suspense com Keira Knightley e Carrie

Keira Knightley Tarzı Tumblr

Review: Knightley makes a decent reporter in 'Boston Strangler

David Dastmalchian joins Keira Knightley and Carrie Coon in Boston Strangler

Keira Knightley Tarzı Tumblr

Keira Knightley and Carrie Coon stun at screening of Boston Strangler in NYC

Keira Knightley Tarzı Tumblr

Keira Knightley and Carrie Coon talk Boston Strangler and true crime

Carrie Coon and Keira Knightley attend the Boston Strangler Premiere News Photo - Getty Images

The true story behind Keira Knightley's new film, Boston Strangler