At 26:13, Linda is wearing a sweater during the family dinner. As the scene progresses there are shots where she has the sweater on, but at 26:46 she has it off. At 26:52 she has it back on again. Finally, at 27:01 it appears she is taking it off (this can be seen in the bottom, right corner of screen).
Early in the "Little Fish" story Detective Malevsky responds to the scene of a body having been pulled out of the river. He says, "Let's see if there's anything in her pockets," and retrieves a note from her front pants pocket. The note is bone dry and even flutters a bit in the breeze. That note would have been water-logged and limp.