1.   At the Kansas City police crime laboratory, investigators worked to come up with a picture of the girl.

2.   But in light of the questions raised about the police laboratory, jurors, in turn, were left questioning how that DNA got there.

3.   But mistakes by the police laboratory in handling the blood samples made it possible to challenge the evidence.

4.   He also said that the police laboratory had not been able to identify the source of the contamination in those other cases.

5.   The Moore case involves the work of a second chemist in the Oklahoma City police laboratory, Janice Davis, who has died.

6.   The station was open, and the damaged train had been towed to a police laboratory.

7.   Two of them blew up at a police laboratory, killing an officer.

8.   A central police laboratory was examining the powder discovered at all four sites and those who had touched the suspicious letters were taken to hospitals.

9.   A fire spokesman said on condition of anonymity that the explosion came from a pressure cooker, which was sent to a police laboratory for investigation.

10.   A central police laboratory was investigating evidence collected at all three sites, police officials said.