Captain of His Soul (1918)

At the suggestion of his sons Horace and Henry, aging Ebenezer Boyce turns over control of his pistol factory to Martin. However, when Ebenezer discovers the extent of Martin's dishonesty and corruption, the shock gives the old man a heart attack and he dies. Soon afterward Martin is discovered dead, and the brothers begin to suspect each other of the murder.

Unfortunately the movie Captain of His Soul is not yet available on HBO Max.