Austin Majors has been revealed.The Los Angeles County Medical Examiner lists the cause of death for Majors — full name Austin Setmajer-Raglin — as «fentanyl toxicity.» The actor was best known for his role as Theo Sipowicz, the son of Dennis Franz's protagonist, Detective Andy Sipowicz, on the long-running crime drama Majors died on Feb. 11, his family announced via.