He's one of the suspects!
Quite a cast in "The Robe"
Richard Burton .... Marcellus Gallio
Jean Simmons .... Diana
Victor Mature .... Demetrius
Michael Rennie .... Peter
Jay Robinson .... Caligula
Dean Jagger .... Justus
Torin Thatcher .... Sen. Gallio
Richard Boone .... Pontius Pilate
Betta St. John .... Miriam
Jeff Morrow .... Paulus
Ernest Thesiger .... Emperor Tiberius
Dawn Addams .... Junia
Leon Askin .... Abidor
Victor Mature was in the sequel, again as Demetrius, "Demetrius and the Gladiators." He was the "keeper of the robe."
The Golden Gate Theater had just installed the giant CinemaScope screen and a new curtain. Darryl F. Zanuck opened the film on a convention screen with the 4:3 ratio to explain the "advent" of wide screen CinemaScope (actually used may years earlier in "The Last Trail" with John Wayne). Then the curtains parted to reveal this enourmous expanse of screen. Quite impressed at a young age, especially when those chariots went racing across the screen from right to left.
Sorry, MA, but I always have referred to the actor as Victor Immature -- it's a joke. This is Lightwizard and nothing is sacred.