Russell has seen that look of "out to kill" on many people but this one is more like blood-lust mixed with intense grief, not a healthy combo. It makes his skin crawl and his every part of him tells him to just back off and leave. All but one. This solitary part makes him stand his ground and tells him to help her with everything that he has. He whispers to her "Tell me more. Tell me how the monster looks. Tell me the look in the monster's eyes when you broken him and you have a gun aiming at his head. Tell. me. everything."