I talked to the school. Apparently ds friend asked him if he would give him a dollar would he kill his sister. Ds said NO! then this kid asked the same thing to another kid in another class that ds was not in. Someone over heard him and told the principal. So after they found the 2 knives and throwing star on friend they questioned ds b/c of that.
Principal said he didn't call me b/c he didn't think it was that big of deal as ds is not in trouble. I told him that he should have and in the future that he needs to b/c by the time I got the info it was that both boys were plotting against the school. And that it was wrong for me to hear about something like that through the grape vine and to get false info. He assured me that he would call in the future.