  We present a measurement of the branching fractions and charge-parity-(CP-)
violating parameters in B -> omega K decays. The results are obtained from the
final data sample containing 772 x 10^(6) BBbar pairs collected at the Y(4S)
resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
We obtain the branching fractions
  B(B0 -> omega K0) = (4.5 +/- 0.4 (stat) +/- 0.3 (syst)) x 10^(-6),
  B(B- -> omega K-) = (6.8 +/- 0.4 (stat) +/- 0.4 (syst)) x 10^(-6),
  which are in agreement with their respective current world averages. For the
CP violating parameters, we obtain
  A(B0 -> omega KS) = -0.36 +/- 0.19 (stat) +/- 0.05 (syst),
  S(B0 -> omega KS) = +0.91 +/- 0.32 (stat) +/- 0.05 (syst),
  A(B- -> omega K-) = -0.03 +/- 0.04 (stat) +/- 0.01 syst), where A and S
represent the direct and mixing-induced CP asymmetry, respectively. We find no
evidence of CP violation in the decay channel B-->omega K-; however, we obtain
the first evidence of CP violation in the B0 -> omega KS decay channel at the
level of 3.1 standard deviations.
