Thin ice (1919)

When Alice Winton's brother embezzles funds belonging to his employer, Benjamin Graves, a promoter of worthless mining stock, she saves him from arrest by signing over to Graves a hefty promissory note. Later Graves deliberately wrecks the mining company in which Alice's invalid father has invested his money, and the shock from the resulting bankruptcy, kills him. Alice marries Robert Burton, a noted criminologist who believes in the theory, "once a thief, always a thief," and the couple takes up temporary residence with District Attorney Jeffrey Miller. In Miller's safe are incriminating documents concerning Graves's illegal activities, and Graves, knowing of their existence, blackmails Alice into stealing them by showing her some compromising love letters to which he has forged her name.