What time was the murder supposed to have been carried out and what time was LM examined thoroughly from head to shin? How long does it take to get rid of bloody clothes and rinse blood off your hands?
LM was wearing clothes. - Socks, boots, long trousers, coat and clothing beneath this. Contrary to common belief he was not extensively 'forensically' examined at all.
Reality of what 'may' have been exposed upon himself to contamination. - Face, parts of head/hair? - Just how difficult is it/would have been, to remove recent contamination from the 'anything' exposed? More so with the most natural source around him for doing so. It is fallacy to apply even this needed some major clean up operation. No one knows the extent of any contamination from the neck up but him. But we do know it was recent contamination whatever it may have been.
He had a hair sample taken, his hair was not forensically examined all over. Finger nail scrapings, and it can never be discounted that he was wearing gloves in the attack. He was out and about in woodland messing about with his mates for a good 90mins. it takes little to get your nails dirty.
The claims of manky ankles/ neck - As above. There was zero requirement, not a snifter of any, to be scrubbing any engrained dirt (if there) from himself. His hair 'appeared unwashed' As above, the little that may have been contaminated, did not require the type of cleaning people apply. Gee whiz, rinsing his greasy mop through in that river would remove but it all. Plus, he had further times frames for repeating that.
I have heard people then apply, but the tests did not pick up algae, any substance from a river! Firstly, they have no idea what the test was for or what it produced. That have only put out the application of 'appeared unwashed' Which has nothing to do with the actual results of hair sample!
Clothing is where the brunt of any contamination would have been upon - LM was not with the boys until two hours after the murder. He then had at least two hours before being in the company of people in that search. The prof was applying that someone would have to have been covered then getting rid of that type of covering. NO one has ever claimed that there would have been nothing upon his actual self. But we do not and can never discount LM being surrounded by the most natural man made source. That only a complete 'fool' would not take advantage of.
As for passing sightings on NR, the only one relatively close being F&W passing by in a moving car. We don't just get to apply he had to have had masses of blood upon him shining bright red, we do apply contamination that had red against dark green/khaki.