what its meaning? "Two others, also from the CIA, compounded the crime by knocking down and killing a third Pakistani as they raced to Mr Davis’s aid." how can I understand it? especially the " compounded the crime by knocking down " another question "As it became obvious that the American was no ordinary diplomat—his car was jammed with extravagant bits of spy gear—anti-American street protests erupted." what,s its meaning? especially "anti-American street protests erupted." thank you .everyboday....