The first victim is shot from the front through what is initially shown to be the left side of his chest, having been shot from his left hand side at a steep enough angle that any exit wound should be through the extreme left of his back. When being examined by Fleur, his shirt now off to expose the wound, there seems to be an exit wound on his right side, inconsistent with the angle from which the shot was shown as taken.
The story claims Alexander Beauvoisin was killed with a wooden bullet and the bullet left an exit wound. Wooden bullets are non-lethal usually used for crowd control. They could only be fatal at very short range and certainly would not be capable of exiting the body.
Two of the wooden park benches seen near the 43 min mark face only tall grass and weeds and have zero view of the lake front park.