The reason there's no need to investigate Tessa Caldwell further is because he knows Old Master Green is a shrewd person. Since Old Master Green is able to trust Tessa Caldwell so deeply, it means her character must be reliable.
He understands that Chuck's entire future is at stake, and Old Master Green would never act recklessly.
The girl's good character is enough for him.
As for other people and matters, it's better to leave them be.
That's why Grandpa Chester skipped all the further steps and directly showed favor to Tessa Caldwell.
Old Master Green has eaten more salt than the younger generation has seen people. To him, regardless of the type of woman she might be, she must have a unique charm to earn his trust in such a way.
To him, Tessa Caldwell truly is an exception.
Because whether he's an old miser or a rich elder, this girl's attitude towards him has never changed, and that is the rarest quality.
Cian Channing said Tessa Caldwell framed her.
