In ‘Under the Banner of Heaven,’ plot gets saddled with another mission

When Detective Jeb Pyre (Andrew Garfield) steps onto the crime scene of the double-homicide case

that’ll swallow him up and spit him out as someone possibly unrecognizable to himself,

the horror of the tableaux before him is conveyed through his reactions.

We do glimpse the first body, a young mother lying face down in her kitchen in a pool of blood.