Why dis the man in the yelliw suit tell the constable he would go ahead of him?

The man in the yellow suit told the constable he would go ahead of him because he wanted to assert his authority and control over the situation. By taking the lead, he aimed to manipulate the circumstances to his advantage, likely to pursue his own agenda regarding the Tuck family or the mysterious spring. His confidence indicated a sense of entitlement and a desire to maintain the upper hand in the unfolding events.