Jr. was coaching some drivers in the Indy Pro Series , though I didn't see him this season.
I found this about his dad on Wikipedia. To my knowledge he was never found.
John Lee Paul (born Hans-Johan Paul, December 3, 1939 in the Netherlands) was an American racecar driver. After his racing career he served a 15-year prison sentence for a variety of crimes including drug trafficking and shooting a Federal witness. In 2001 he disappeared on his boat while being sought for questioning by officials regarding the disappearance of his ex-girlfriend.