The effort to prosecute two boys, ages 10 and 11, for allegedly bringing weapons to a Colville school in a plot to kill a classmate is posing some legal challenges because the suspects are so young.

The state's criminal justice system presumes that children below the age of 12 do not have the capacity to understand they are planning to commit crimes.

Stevens County Prosecutor Tim Rasmussen says a judge can allow prosecutors to pursue criminal charges in juvenile court for children between the ages of 8 and 12, but only if prosecutors can show the youths understood the difference between right and wrong.

That capacity hearing is set for Feb. 20 in Colville, about 75 miles north of Spokane.