The grandson of a legendary Houston oil man passed away in his River Oaks home.

The medical examiner said Roy Henry Cullen, 84, was found dead at his River Oaks home Friday.

It's believed he took his own life.

A visitation for Cullen is being held on 1010 Bering Drive Monday night from 5 p.m. to 8 p.m.

A memorial service is scheduled for Tuesday morning at 11 a.m. at The Church of St. John the Divine located on 2450 River Oaks Boulevard.