He reportedly was suffering from Alzheimer's disease.

Falk first played Lieutenant Columbo (his first name was never clearly announced, though one badge image lists it as "Frank") in a 1968 TV movie. Its popularity led to a second film and then to the series, which ran from 1971 to 1978. Even after the show was canceled, Falk would play the laid-back detective in "Columbo" TV movies.

"He looks like a flood victim," Falk once said of his famous character. "You feel sorry for him. He appears to be seeing nothing, but he's seeing everything. Underneath his dishevelment, a good mind is at work."

Columbo's trademark was an ancient raincoat Falk had once bought for himself. After 25 years on television, the coat became so tattered it had to be replaced. -msn.com

Edited by Jess T.