From the NTSB briefing just now, it emerged that N72EX was operated as a part 135 VFR charter. The NTSB does not yet know how well the IFR instruments in the helicopter were maintained (but they have retrieved the maintenance records and other paperwork carried on the aircraft).
I believe that part 135 helicopter pilots are (were?) supposed to be trained in recovery from inadvertant instrument metereological conditions (IIMC).
https://www.faa.gov/documentlibrary/...n_8900.437.pdf
Is that actually being done regularly?