The original composite sketch of the San Francisco serial killer called the "The Zodiac" was released in 1969. He was described to be a male, white about 35 years of age. The Zodiac Killer was never caught. He would be in his seventies today, if still alive.
This was an age progression based on the original composite sketch. Since this is a very cold case. This unique age progression composite technique seemed appropriate. You can see the full Zodiac story on History Channel's "MysteryQuest".