|This needs a stretch.|
Needed: History is missing details.
Mr. Carswell was a bank president.
Mr. Carswell is a slightly overweight and out of shape middle-aged male white hair. He wears a blue suit, white shirt, and a black tie, along with glasses.
He acted friendly and well-mannered, but in reality, he is an embezzler who violently beats up one of his own bank guards who had evidence against him.
Scooby-Doo, Where Are You!
They brought him to Carswell's house. Once the gang had gone, Carswell then proceeded to tie up the bank guard and lock him in the basement; then went after Scooby-Doo and the gang when he realized they held evidence (they innocently took from the bank guard) that proved he was a thief.
Mr. Carswell: Blasted meddling kids!