Other mistake: When Wai Lin lets go of the handcuff after handcuffing Bond to the water pipe you can see the handcuff accidentally come open. It was obviously never locked even though they added the sound of it clicking locked. (01:21:15)
Other mistake: When Carver is typing Bond's obituary on the big screen, he hits many more keys than would be necessary to write the end of the sentence.
Answer: Elliot Carver arranged it, he called Dr. Kaufman, who said, he is a specialist in arranging the perfect murder. His specialty is the celebrity suicide.