This is quite a lot of heresay. Can you help sort it a bit?
Is the employee who filed the OSHA report the same one who was "electrocuted"?
I assume the accident victim filed an L&I claim which, in some states at least, would trigger an OSHA notification and subsequent follow up.
In the case of a serious accident such as electrocution, OSHA would do more than follow up on it, they would pay them a visit.
I know this for a fact. Having worked in Biotech where "hot" materials were in use, even the smallest claim got us a visit.
Back in ancient days, the Druids thought black cats were human beings.