You are probably right. But it is still odd that in 27-28 pages of autopsy report they had forgotten to include that Conner had tape around his neck and a cut on his shoulder.
From the Marina in Berkeley, in like all bodies of water, debris is all over the place, and plant like stuff, over growth etc.. so, stuff could of trapped in and around the shorelines, and that is a rock embankment, surf break?, so I can see the final soft tissues cutting from the ocean's current thrusting the decomposed bodies to shore. Hence the cut marks, and entangling in the debris around there.
I heard so many accounts of type of tape, so I just left at that. If it was video tape, cassette tape, normal to find that on the roadways, grounds. The winds pick that up and throw that around. Maybe the coroner investigator thought nothing of it, or over looked it's value.