RE: If a pool of blood anything bigger than drops = foul play - as I agree a nosebleed would be collected by someone prepared with napkins or tissues or a towel to collect it... and if in back seat and it is JR's then a definate foul play link...
Seems that it would be reasonable to conclude that a person that has reoccurring nose bleeds would also have a handkerchief or kleenex handy. Since JR's dad located her van. Imo, there was likely enough blood residue visible to indicate foul play.
http://thedailystar.com/localnews/x1503756987/Report-Blood-found-in-missing-womans-van
Ganesh Ramsaran said he did not personally see the blood in the vehicle, but was advised by investigators that
a quantity of blood was in the van after it was located in Norwich by Jennifer Ramsarans father
http://www.finalanalysisforensics.com/docs/BasicBloodstainPatternAnalysisTEXT.pdf
Bloodstain pattern analysis involves the scientific study of the static consequences
resulting from dynamic blood shedding events. A detailed study of bloodstain
patterns at crime scenes often develops invaluable evidence. The distribution, size
and shape of bloodstains on a victim, on a suspect, or on the walls, floors, ceilings, or
on objects at the scene can help reconstruct these blood shedding events. Bloodstain
pattern analysis can also help one evaluate the credibility of statements provided by a
witness, a victim, or a suspect.
Physical evidence waits to be detected, preserved, evaluated, and analyzed.
Herb
McDonnell once said that in the course of a trial, both defense attorneys and
prosecuting attorneys may lie, witnesses may lie, and the defendant certainly may lie.
Yes, even the judge may lie. Only the evidence never lies.