The details of Jane Doe's mouth and tip of nose are likely approximations since the remains were several months old and the soft tissue wouldn't have been preserved.
Kyanja wasn't ruled out. I posted as a potential negative that Kyanja at 5'6" and at least 165 lbs is quite a bit larger than the petite Jane Doe, but there's enough time for her to have lost weight and the height alone isn't a big enough difference to be a problem. She seems to fit rather well otherwise.
Iowa Cold Cases has a little more information:
http://iowacoldcases.org/case-summaries/kyanja-vanwey/
Kyanja's Namus entry:
https://www.findthemissing.org/en/cases/6765/0/
Namus indicates that Kyanja has DNA in the system, so it's likely a ruleout by default, however.