In Monster, when they went to find fingerprints what did they come up with as the result?

During the trial, King's lawyer, Asa Briggs, cross-examines Detective Karyl and asks him if he dusted the area for any fingerprints. Karyl says that the crime-scene technicians didn't find any fingerprints that they could establish belonging to the perpetrator. Briggs then asks him if it is true that they hurried the investigation in order to seek informants willing to give information on the case. Karyl responds by saying that they treat each case carefully and that they don't just go through the motions. Briggs then asks Karyl if they found any fingerprints on the cash register or the counter. Karyl tells him that none of the prints were clear enough to use. Asa Briggs then comments that it isn't hard to find people in jail that are willing to swear that somebody else is a bad guy. After Karyl says that they check every story and give everybody the benefit of the doubt, Briggs says, "But you don't check for fingerprints?" (Myers 80). Briggs is attempting to persuade the jury that the investigation was rushed, and the detectives simply took the word of other criminals attempting to receive shorter sentences by casting the blame on other people.