I do agree that males (on average) are taller than females. However, I respectfully, question this source. My husband is Jewish and we live in a very Jewish area of the country. Most of the Jewish men I know are 5'10" and taller - quite opposite of the stereotype many people have that "Jewish men are short." Plus, the range given for the perp (5'2" to 5'7" is quite broad in my opinion). I just think it's a bad idea to start deciding the perp is a certain "ethnicity" - what if we knew the perp had a big nose? Would we then say - certain ethnicities have big noses? And then start saying the perp must by x ethnicity? Plus, here's a link that counters the ethnicity/height correlation.
http://genetics.thetech.org/ask-a-geneticist/ethnic-groups-and-height
I post the link just to point out that there is debate w/in scientific the community about a lot of topics, and this appears to be one as well.
Plus, for MB's case, even LE is just saying the perp is "light-skinned" - that's pretty vague. Think of how many "ethnicities" have light skin. I think we need to focus on evidence of car, relationships, etc. Not enough to go on w/ physical characteristics at this point. JMO.