We consider a one dimensional random walk in random environment that is
uniformly biased to one direction. In addition to the transition probability,
the jump rate of the random walk is assumed to be spatially inhomogeneous and
random. We study the probability that the random walk travels slower than its
typical speed and determine its decay rate asymptotic.Comment: 13 pages. There are corrections in the extreme value lemmas and the
quenched slowdown estimate