en.wikipedia.org/wiki/Molly_K._MaCauley
So far I did not manage to find any killed scientist were working on satellites to cell phone communication. But I found two additional NASA scientist who died suspiciously.
cbsnews.com/news/police-missing-nasa-scientist-found-dead-in-maryland/ [think water]
dailymail.co.uk/news/article-2905123/Pilot-killed-small-plane-crash-NASA-scientist.html