“At this time, the circumstances surrounding their deaths are being treated as suspicious,” the sheriff’s office said in a statement, adding that they were treating the killings as homicides.Yes, but they've not come out and said that.
"At this time" means they might change their minds later.
"being treated as suspicious" doesn't mean they are suspicious, just "being treated" that way.
This was published in the New York Times 2 days ago...to me, it indicates they have doubts or they wouldn't be hedging their comments like that...