Elwen Evans QC, prosecuting, has asked Mark Bridger about April Jones' parents, Paul and Coral.
Mr Bridger said: "I can't even start to understand what they were going through. It was through speaking to [my boss] and the postman that I knew there was a huge search going on."
Miss Evans: "You had killed an unknown little girl."
Mr Bridger: "Yes."
Miss Evans: "You didn't even bother to find out who that little girl was."
Mr Bridger: "What was I supposed to do? Knock on people's doors?"
He said he 'didn't recognise' April that night because it was 'dark'.
He told the court: "My instinct was to go to the police station."
Miss Evans: "Did you go?"
Mr Bridger: "No."
The parents of murdered April Jones fear that killer Mark Bridger may never reveal where the body of their daughter is.
ITV News correspondent Carole Green has covered the month-long trial of Mark Bridger at Mold Crown Court. Here she gives her personal view.
The disappearance of April Jones prompted the biggest search of its kind in British policing history.