Tao says the impact of the bullet pushed the victim over the balcony rail. The bullet came over the rail so any impact would have pushed the victim back away from the rail, not toward it.
The room behind the two way mirror is fully lit so it is brighter than the interview room. Two way mirrors are not miraculous objects that only let light pass through in one direction, the room behind the mirror must be dimmer than than the conference room in front.
Julio describes the exact rifle used in the shooting from nothing more than the caliber of the bullet which can be fired from dozens of rifles so Julio could not possibly know what model let alone the exact configuration.