While the dentist and his son claim the doctor hit first, according to the victim, it was the dentist who struck first:
According to Sivak, a verbal altercation escalated to a physical altercation when Orobitg hit Sivak in the leg with a golf club.
“At some point [Orobitg] struck him with a golf club on the side of his head from behind and that during the altercation he defended himself by striking [Orobitg] with his water bottle,” the affidavit said. “He stated that [Orobitg] continued to strike him several times and that he believes his ribs were broken.”
https://lawandcrime.com/crime/dentist-accused-of-bludgeoning-doctor-in-golf-course-altercation/amp/
Video of interview with the victim
https://m.youtube.com/watch?v=wDI74mNDsr0