Are you saying that's what happened or ar you just speculating?
Listen to the sound on the mall video for yourself and decide.
Sure sounds like the kid yelled "allu akbar" several times when the cops confronted him, but the tape is poor quality and there are lots of echoes.
From another thread:
A video has become available, taken by someone hiding in a gift shop:
http://kutv.com/topstories/local_story_044000331.html
A bit past midway through, does anyone else hear what sounds like "Allah-hu akbar! Allah-hu akbar!" - just after one of the cops shouts "Police"?