https://ucr.fbi.gov/leoka/2011/officers-feloniously-killed/officers-feloniously-killed
   "77 alleged offenders were identified in connection with the 72 law enforcement officers feloniously killed....

    The average age of the alleged offenders was 32 years old.
    The average height was 5 feet 9 inches tall, and the average weight was 181 pounds.
    75 of the alleged offenders were male; 2 were female.
    43 of the alleged offenders were white, 29 were black, 2 were American Indian/Alaskan Native, and 1 was Asian/Pacific Islander.  The race was not reported for 2 offenders.
    Most (64) of the alleged offenders had prior criminal arrests.
    17 of the alleged offenders were under judicial supervision at the time of the incidents.
    8 of the alleged offenders were under the influence of a controlled substance at the time of the fatal incidents.
    7 of the alleged offenders were under the influence of alcohol or were intoxicated at the time of the fatal incidents. "