confirmed death sentences for muslim brotherhood leader and 13 others .
american-egyptian mohamed soltan , 27 , sentenced to life in prison .
he lived in missouri , michigan and ohio before moving to egypt in 2012 .
found guilty of ` plotting unrest ' after coup against president morsi in 2013 .
ohio state graduate had worked as journalists ' translator at protest site .
he had lost 98 pounds during his hunger strike as of last year .