  Chiral magnetic effect (CME) is a macroscopic transport phenomenon induced by
quantum anomaly in the presence of chiral imbalance and an external magnetic
field. Relativistic heavy ion collisions provide the unique opportunity to look
for CME in a non-Abelian plasma, where the chiral imbalance is created by
topological transitions similar to those occurring in the Early Universe. The
isobar run at Relativistic Heavy Ion Collider was proposed as a way to separate
the possible CME signal driven by magnetic field from the background. The first
blind analysis results from this important experiment have been recently
released by the STAR Collaboration. Under the pre-defined assumption of
identical background in RuRu and ZrZr, the results are inconsistent with the
presence of CME, as well as with all existing theoretical models (whether
including CME or not). However the observed difference of backgrounds must be
taken into account before any physical conclusion is drawn. In this paper, we
show that once the observed difference in hadron multiplicity and collective
flow are quantitatively taken into account, the STAR results could be
consistent with a finite CME signal contribution of about $(6.8\pm2.6)\%$.
