  Rare flavour changing neutral current decays are sensitive indirect probes
for new effects beyond the Standard Model (SM). In the SM, these decays are
forbidden at tree level and are therefore loop-suppressed. In SM extensions,
new, heavy particles can significantly contribute and affect both their
branching fractions as well as their angular distributions. The rare decay
$B^0\to K^{*0}(\to K^+\pi^-)\mu^+\mu^-$ is of particular interest, since it
gives access to many angular observables, allowing to model-independently test
the operator structure of the decay. A previous analysis of the angular
distributions of the final state particles showed interesting tensions with SM
predictions using the data sample taken by the LHCb detector during 2011. These
proceedings will summarize latest results on rare decays from the LHCb
experiment with emphasis on the angular analysis of the decay $B^0\to
K^{*0}\mu^+\mu^-$, using the full Run I data sample of the LHCb experiment.
