Is J.D. Salinger's most successful work influential to killers?
Step-by-step reasoning process below:
yes
J.

D.

Salinger's most popular work was Catcher in the Rye.

John Hinckley Jr.

tried to assassinate Ronald Reagan after reading Catcher in the Rye.

Mark David Chapman had a copy of Catcher in the Rye when he assassinated John Lennon.

Robert John Bardo carried a copy of Catcher in the Rye when he murdered actress Rebecca Schaeffer.

.

The answer is yes