Hi ebbie...good points!
Yes, my hair is very noticeably graying

. I stopped dying it in 2009 when I was 33 because I was pregnant with my daughter and I wanted to avoid unneccesary chemicals in my body. If I had a dime for everyone at work and church who said "Wow, you've really got some gray hair!" - I'd be rich

(And isn't that what every pregnant woman wants to hear??

) But it runs in my family on my mom's side. Quite a few of my cousins and uncles grayed early.
My husband is 40 and has no grey hair at all.
The wording of that "dyed red dyed blond" description drove me crazy too. It made no sense. I know that caries is a legitimate word in dental parlance, but I'm embarrassed to admit I have no idea what it means. But I've seen it before on other UID's.
Someone else here, Carl, I think asked the same question about the exposure. We've seen many UID's in much colder locations for that period of time or longer where that didn't seem to be as much of an issue.
I think the coroners do always take pictures of the face. I just think they don't always release them, especially the ones that are harder to look at. I know in the county where I live, the NamUs profiles often have no photos, but what frustrates me is they usually don't even have a sketch or anything to work off of either.