A decade should be a good amount of time to bring anyone up on any charges.
Imagine you punched someone in the head during a drunken bar fight, you didn’t get hurt and the guy was still alive but on the floor, so you left. Now it’s 30 years later and you’re running for a high status political office. During the election time that dude that you punched in the head decades ago comes forward is like @TheOctonaut it’s a horrible person! One time in a bar fight 30 years ago they punched me in the head and I got a concussion. They left me there to die! They should be charged with felony assault because of what they did to me!
Wouldn’t you be a bit pissed? You probably forgot about him decades ago. And why is he bringing it up decades after it happens?