This is from the NY Post:

ARRESTS SOAR FOR YOUNG & RUTHLESS

By ANGELA MONTEFINISE

October 14, 2007 — More New York City kids are spending time in the clink.

A staggering 52,571 kids between the ages of 13 and 18 were arrested in 2006 - a 20 percent increase over the 44,148 kids arrested in 2002, according to a report being released at City Hall today by Bronx Borough President Adolfo Carri??n's office.

Robberies and assaults accounted for 74 percent of all juvenile crimes committed in those five years, including 54,936 felony robberies and 27,638 felony burglaries, the report says.

Teens also committed 698 murders, 1,520 rapes and 12,770 grand larcenies in that time.

Here are the demographics of the Bronx:

The racial makeup of the borough was 35.64% Black or African American, 29.87% White, 0.85% Native American, 3.01% Asian, 0.10% Pacific Islander, 24.74% from other races, and 5.78% from two or more races. 48.38% of the population were Hispanic or Latino of any race. (The 2005 U.S. census estimates that the percentage of Latinos has increased to a majority: 51.3%.) The Bronx has one of the highest percentages of Puerto Ricans and Dominicans in the U.S. with 24.0% and 10.0%, respectively. However, the Puerto Rican population has slowly been declining over the last few years as the Dominican population has increased.

West Africa is a frequent region of origin for immigrants to the Bronx. U.S. Immigration and Naturalization Service data shows that in 1996, about two-thirds of those Ghanaians arriving in the United States (6,269), and nearly three-fourths of those naturalized (3,084) live in New York City. Many have clustered in Bronx communities, including Morris Heights, Highbridge, and Tremont.^[13]

Based on sample data from the 2000 census, the U.S. Census Bureau estimates that 47.29% of the population five and older speak only English at home. 43.67% speak Spanish at home, either exclusively or along with English. Other languages or groups of languages spoken at home by more than 0.25% of the population of the Bronx include Italian (1.36%), Albanian (1.07%), Kru, Ibo, or Yoruba (0.72%), French (0.54%).

And here's the picture the NY Post uses to illustrate this report of a teen crime wave:

The story makes no mention of the ethnic groups of anyone involved.