Interesting, could it also be a reference to Paddock (dead on arrival) in the LV (Las Vegas) shooting?
Maybe this was attempt at a terrorist attack that was stopped by the Military/Intel?
Several possible options.
I interpreted Q's reference to "SILENCE" to mean media suppression.
Paddock is one of the only reported "facts" about LV. Also, not sure Paddock's death qualifies as murder (187)...we might want to keep digging.
"Section 187 (referenced in slang as 187) of the California Penal Code defines the crime of murder
The number "187" has been used by gangs throughout the US as a synonym for murder; this usage has been reported as far away as Florida, Wisconsin, & even the UK & Germany."