there is a flashback scene to a known abuser attempting to use a belt to kill someone. the scene is brief and the victim does escape, but the discussion and visual may be triggering for some viewers
Since some people like myself can handle dead/quickly-dying animals fine, but are conversely EXTREMELY triggered by abuse/slow suffering/torture, I wouldn't categorize this as abuse.
Its grotesque, but you don't see/hear the cat suffer, and you don't see/hear it die, and the reaction from the protagonists is appropriate and relatable.
Around 1 hr and 29min he'll leave his computer and open the door and yell "FU**". At this point you should immediately look away, there is a very graphic and realistic looking dead cat.
no character is crushed to death on screen, however there is a mention of a previous murder cases where the victim was crushed and a visual is displayed on screen for a few seconds. there are also two scenes where a character is injured and pinned in a car crash, though neither die as a result
there are three visuals of attempted asphyxiation shown on screen. one character is grappled from behind and choked until unconscious, which is shown in a series of brief clips. one is an extended scene where a character is hung (though later is rescued), and the last is a brief flashback clip where a character is choked with a belt (though escapes off screen)
if an animal is your concern: Daniel Craig is going to open an outside door and shout. Rooney will go outside with him. when you hear him shout, look away for a minute. if human: look away when Rooney enters a room holding a golf club. safe to look again when you see a fire on the bridge
I don't believe any characters are stabbed on screen, however there are mentions of previous murder cases whose victims were stabbed, and visuals are displayed on screen for a few seconds
while there is no direct or detailed depiction of mental illness, there is discussion of a character having been institutionalized in the past for violence and mental illness and a character does refer to themselves as being "insane," which may be triggering for some viewers
during the investigation there is some discussion of bible verses, which are narrated. there are also family members who are nazis and antisemitism is discussed as a possible motivation for murder