We present measurements of pion elliptic flow (ν2) in Au + Au collisions at sNN=200,62.4,39,27and19.6GeV, as a function of event-by-event charge asymmetry (A±), based on data from the STAR experiment at RHIC. We find that π−(π+) elliptic flow linearly increases (decreases) with charge asymmetry for most centrality bins and for all the beam energies under study. The slope parameter (r) from ν2(A±) difference between π− and π+ shows a centrality dependency similar to calculations of the Chiral Magnetic Wave. The measurements of charge separation with respect to the reaction plane in search of Local Parity Violation and the Chiral Magnetic Effect are also presented for Au+Au collisions at sNN=200,62.4,39,27,19.6,11.5and7.7GeV, and for U + U collisions at 193 GeV.