I enjoy watching YouTube's ancient "What's My Line?" episodes, in which Kilgallen was a panel member. That's what prompted me to read her wiki entry.
I read a bio of her. She was a very smart and very driven girl. While her rep highlighted the “gossip” columns, she was also a real journalist. She was no lightweight. Light years ahead of what is today considered an investigative journalist.
The bio was a bit slanted in her favor, but clearly showed the woman had serious substance.
I do believe that her death was connected to her JFK assassination investigation.
My father was at the Pentagon when JFK was “elected” and served as a USMC “advisor” in Vietnam at the time of JFK’s assassination. My interpretation of some of what he said when he returned (I was 12) lead me to believe that JFK’s assassination was at least partly related to his intent to pull out of Vietnam.