On the death of Sergei Khrushchev

 I recently learned that my old friend Sergei Khrushchev was killed mysteriously at the same time I was being held at fort devens

Notice how they do not use the words suicide or murder, which is suspicious in itself, as he could have been killed and had no history of mental instability.
I knew Sergei personally, and this news is shocking, and I want to know why his murder is not being looked into further