(Remember that thread "How did Aftran do it?" This is similar.)
After thinking it over, and going by what Dr. Kaehler said, I have arrived at a semi-final conclusion as to how David successfully replaced Saddler.
Some [doctors and nurses] looked like they'd just had Leonardo DiCaprio tell them they were pretty. They looked transfigured. Others looked mad. Some looked scared.
Saddler's mother [Ellen] rushed to the head doctor. "Doctor Kaehler? What's happening? What's happening to my baby?"
Doctor Kaehler was one of the mad ones. "What's happening? Good question. Very good question. I have to tell you that we had a crisis here about an hour ago. Your son's heart stopped. We were rushing him to surgery, but in all honesty he was not going to make it."
"But --" she began.
The doctor ignored her. "I would have bet my entire career that Saddler would be gone within the hour. Then, as they were taking him up to the O.R., something happened with the elevator. It jammed or... something. The nurse and doctor with him seem to have been knocked out. When they came to, the elevator was working again. They rushed your son to surgery where he... where he... opened his eyes!"
"What?"
"He opened his eyes. And he said, 'Hi.'"
David knew that Saddler was at the children's hospital. He scoped out Saddler's room as a Golden Eagle, looking in through the windows. When he found Saddler's room, he crawled in as a ****roach
(why do these forums hide that all the time?!?) . David heard the doctors talking about how they would need to bring him to surgery soon, and he heard that it would be on another floor. David got into the hospital with Marco's body (wearing a morphing outfit - bike shorts and a T-shirt), found the elevator control room, and using his knowledge and skills he may have picked up from his father's work in the NSA, he got on top of the elevator car he knew Saddler would be in.
David morphed the security guard he acquired back at the Marriot resort hotel banquet room (badly stretching but not breaking the underwear, shorts, T-shirt, and socks he was wearing - he took off his shoes), for the extra strength, and waited. The nurse and doctor wheeled Saddler into the car, and when the doors closed, David disabled the elevator from the controls on top of the car. The nurse and doctor noticed this. David silently dropped down and gave each one a quick knock on the back of their head to put them out for a bit. David demorphed, acquired Saddler's DNA, stripped him of his hospital gown, and then... what? Did David dump Saddler (alive or dead at this point?) down the elevator shaft? That's what I think he did. It's not like he could go out into the hallway to stuff Saddler somewhere there.
David morphed into Saddler, ditched his own clothing and shoes... somewhere (help?), and put on Saddler's hospital outfit. He climbed up to the elevator's roof, restarted it, and closed the access door. He climbed back onto Saddler's gurney or whatever and waited for the nurse and doctor to wake up. He closed his eyes and pretended to be unconscious like Saddler was.
While David thinks at this point that he has killed Tobias, he has also by this point undoubtedly killed Saddler for sure.
So, can you guys help me? Are there any holes in my story? What exactly killed Saddler after David acquired him? Disease/injuries? Or impact from a fall? What did David do with his old clothes? Thanks in advance for any input you have!