  The Chiral Magnetic Effect (CME) is predicted for Au-Au collisions at RHIC.
However many backgrounds can give signals that make the measurement hard to
interpret. The STAR experiment has made measurements at different collisions
energy ranging from $\sqrt{s_{NN}}$=7.7 GeV to 62.4 GeV. In the analysis that
is presented we show that the CME turns on with energy and is not present in
central collisions where the induced magnetic is small.
