We present the density structure of dark matter in the outer parts (to about 7 effective radii) of the elliptical galaxy NGC 4636, from the radial velocities of 174 globular clusters, using the non-parametric, Bayesian algorithm CHASSIS. We find the galaxy to be rich in dark matter, with R-band mass-to-light (M/L) ratios rising to about 30, at nearly 4R_e; the K-band M/L at about 3R_e is found to be nearly 10. The result does not depend on applying the method to the red and blue globular

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... s separately. This estimate of M/L is higher than the previous analysis from the same kinematic data. We also find that the dark matter distribution is highly concentrated towards the inner halo.