Given the following context:

Star Reporter, John Randolph, with his fiancée, Barbara Burnette, (Marsha Hunt), has faith in her father, D.A. William Burnette, and throws the full weight of his newspaper behind him, in hopes of tracking down his own father's killer.
John is convinced that his father was murdered to stop him from revealing the organized crime bosses, in the city. Now, all he needs is proof. Just as he's about to get the goods on the criminal kingpin, lawyer Whittaker, there is another murder.
Little does John suspect that the confessed killer, Joe Draper and his own mother, Mrs. Julia Randolph have their own deep, dark secret, from the past: the true identity of her long, lost, already declared dead, husband; and, John's real father.
Whittaker and his mobsters will do anything to close the case. They're willing to shut anyone up permanently, who they can't buy off. John will stop at nothing, to see justice done, even when his own fiancée and Mother warn him that he might not be ready to handle the truth!

answer the following question:

What is the first name of the person who needs proof about a murder? 

John