“Because Scott landed in water, some evidence on his body was contaminated,”
Well, it is the Chicago River. I have a friend who works in an office building along the Chicago River, and when it rains really hard, he can watch the poo float by.
As for a note, they might want to check Fort Marcy Park, or a stray table in the White House, or a state trooper office in Arkansas.
In the old days, they would write up a suicide note for you, tear it into little pieces, and leave it in your briefcase where people could find it. Nowadays, they type the suicide note into your blackberry after they kill you, then leave the blackberry near your body.
Or the trunk of a car junked in the Arkansas woods full of documents from the Rose Law Firm.