From the Rolling Stone article:
Family members of the dead and missing are frustrated by the swirl of conspiracy theories. Michael David Hicks daughter said that speculation about her fathers death has shaken her. From what I know of my dad, theres no train of logic to follow that would implicate him in this potential federal investigation, Julia Hicks told CNN. I dont understand the connection between my dads death and the other missing scientists. I cant help but laugh about it, but at the same time, its getting serious.
Amy Eskridges father, Richard Eskridge, a former NASA scientist, denied that his daughters suicide was suspicious, saying, Scientists die also, just like other people. William McCaslands wife wrote on Facebook that, when McCasland was in the Air Force, he had access to some highly classified programs and information, but that he had been retired for more than a decade. It seems quite unlikely that he was taken to extract very dated secrets from him.
From the BBC, published after Trump stuck his fat self into this:
Relatives of 10 scientists who died or vanished grapple with impact of wild speculation
"Ordinary mortality over 22 months predicts ~4,000 deaths, ~70 homicides, and ~180 suicides. The list has 10
The deaths are real. The families' grief is real. The pattern is not."
Louise Grillmair, similarly, says that - while her husband "would laugh" at speculation that the deaths might be connected - he would also "probably talk statistically" to squelch conspiracies.
The wife of retired Air Force General William Neil McCasland - the highest-ranking and highest-profile of the missing - took to Facebook the week after his 27 February disappearance from their New Mexico home to "dispel some of the misinformation circulating".
...
The family of Melissa Casias also addressed the case on Facebook - again indicating that their loved one left deliberately. Their comments did little to dampen theorists' obsession with her case.
https://www.bbc.co.uk/news/articles/cwyw9rpdl4po