  We present new HI observations of the high-velocity cloud (HVC) that we
resolved near the Local Group dwarf galaxy LGS 3. The cloud is rotating, with
an implied mass that makes it dark matter-dominated no matter what its distance
from the Milky Way is. Our new, high-sensitivity Arecibo observations
demonstrate that the faint HI features that we previously described as tidal
tails are indeed real and do connect to the main body of the HVC. Thus, these
observations are consistent with our original hypothesis of a tidal interaction
between the HVC and LGS 3. We suggest that the HVC may be one of the missing
dark matter satellites in the Local Group that are seen in Cold Dark Matter
numerical simulations but have not yet been identified observationally.
