After the meal.
Little Black said goodbye to Luke and drove away.
Luke sat in the driver's seat, smoking and thinking.
Since he had accepted Danny Carter's commission, and the fee offered was very generous, he naturally wanted to give it his all.
Relying solely on Little Black was definitely not going to work; Luke had to start investigating from other angles as well.
Moreover, being a detective is different from being a police officer. If Luke were speaking as a police officer, he would certainly have to talk to the female victim, Billie Warwick.
But that wasn't possible now. Luke's identity wasn't appropriate for direct contact with Billie Warwick; even if he hid his identity to talk to her, she would avoid discussing any sensitive topics once asked.
Luke needed to abandon the familiar way of handling cases and investigate as a detective would.