Yeah, you are right. However, I am pretty sure they do what they can to find such evidence from the hospital. That´s why dragging the case. Also, it´s very hard to believe that a person who is in the prime of their life just falls from a balcony. People just don´t go out and fall down. As the guy probably can´t prove that he was sober, they might try stating statistics in their favor. In that case they will find that the larger percentage is suicidal or affected by alcohol or other drugs.