The writer of the Dick Tracy comic strip, Michael Kilian, has died at the age of 66.
A columnist at the Chicago Tribune newspaper he was also writer of many mystery novels.
The Dick Tracy cartoon was created by Chester Gould and first appeared in the Chicago Tribune newspaper in 1931, and has been syndicated ever since.
When Gould died in 1977 the strip passed to cartoonist Dick Locher, who then teamed up with Kilian.
As well as writing the cartoon, Kilian also wrote more than 6,000 articles on topics ranging from politics to the arts.
Locher said his colleague wanted to be involved in all parts of journalism.
"He'd take a task and run with it. He loved it. He immersed himself," he said.
Kilian wrote 24 novels on varying subjects from the civil war to the world of espionage.
Kilian's wife Pamela said her husband had suffered a liver complaint a year ago but had continued working until recently.