  We have detected CO(4-3) in the z=3.8 radio galaxy 4C 41.17 with the IRAM
Interferometer. The CO is in two massive (M_dyn ~ 6 x 10^10 M_Sun) systems
separated by 1.8" (13 kpc), and by 400 km/s in velocity, which coincide with
two different dark lanes in a deep Ly-alpha image. One CO component coincides
with the cm-radio core of the radio galaxy, and its redshift is close to that
of the HeII AGN line. The second CO component is near the base of a cone-shaped
region southwest of the nucleus, which resembles the emission-line cones seen
in nearby AGN and starburst galaxies. The characteristics of the CO sources and
their mm/submm dust continuum are similar to those found in ultraluminous IR
galaxies and in some high-z radio galaxies and quasars. The fact that 4C 41.17
contains two CO systems is further evidence for the role of mergers in the
evolution of galaxies at high redshift.
