Yes, it’s drivers who got in trouble with the law. Tomas Scheckter was caught soliciting a prositiute. Jos Verstappen was arrested for assault. And Lehto was charged with manslaughter.
However, I can’t remember who the fourth was. I did, after all, post the question two weeks ago. I know it wasn’t Bertrand Gachot, because I didn’t want to make it too obvious. And it wasn’t Adrian Sutil, because he wasn’t formally charged until after I posted the question.
Somebody else can have a go.