11.   A tour on the night shift with Officers Chris Timms and Guy Thacker offered a window on the problems linked to the homicide rate.

12.   But criminologists say it is harder to predict, or understand, short terms swings in homicide rates, which may not be statistically significant.

13.   But Rosenberg said that previous surveys had shown that when studies were controlled for poverty, education and income, homicide rates by blacks and whites were very similar.

14.   But states without the death penalty often have noticeably different homicide rates than states that are similar in other ways.

15.   But the homicide rate rose for reasons that police officials are still exploring.

16.   But with homicide rates falling and the use of seat belts and motorcycle helmets increasing, there are far fewer victims who could be donors.

17.   Challenging conventional academic wisdom, Elias suggested, too, that the power of the state extended to cities first, so urban homicide rates would be comparatively low.

18.   During the five years that the homicide rate among teen-age offenders has been falling, the population of adolescents has already begun to rise.

19.   East New York had the highest homicide rate in the city last year.

20.   Dr. Overpeck said she did not know why the infant homicide rate was increasing.