Simplify the following text for a Grade 8 native English-speaking person.
Original: Andrew Broughton , who was Mayor of Maidstone in 1649 ( and also Clerk to the High Court of Justice ) was responsible for declaring the death sentence on Charles I , and today a plaque in Maidstone Town Centre memorialises Andrew as ` Mayor and Regicide ' ( a killer of kings ) .
Simplified: A year later , Andrew Broughton , who was then Mayor of Maidstone ( and also Clerk to the High Court of Justice ) gave the death sentence to Charles I. Today there is a plaque in Maidstone Town Centre describing Andrew as ` Mayor and Regicide ' ( a killer of kings ) .