The generic  thriller conventions used in 'Faceoff' like obsessiveness from the main character to find the killer of his child wont stop till he is found, we know this as he is a detective trying to find him years later. The clip also includes erie music when killer is preparing to shoot his target with dramatic sounds like him moving the gun cover and his drinking his drink. We see a extreme close up on the gun and the bullet as it leaves the gun and hits the target this gives more emphasis on the baby being shot.