  The dynamics of the high-velocity compact molecular cloud CO-0.40-0.22 have
been interpreted as evidence for a $\sim10^{5}M_{\odot}$ black hole within 60
pc of Sgr A*. Recently, Oka et al. have identified a compact
millimetre-continuum source, CO-0.40-0.22*, with this candidate black hole.
Here we present a collation of radio and infrared data at this location. ATCA
constraints on the radio spectrum, and the detection of a mid-infrared
counterpart, are in tension with an Sgr A*-like model for CO-0.40-0.22* despite
the comparable bolometric to Eddington luminosity ratios under the IMBH
interpretation. A protostellar-disk scenario is, however, tenable.
CO-0.40-0.22(*) is associated with an arrowhead-shaped infrared-dark cloud
(which we call the Freccia Rossa). Radio-continuum observations reveal a
candidate HII region associated with the system. If the $V_{\rm LSR}\approx70$
km s$^{-1}$ systemic velocity of CO-0.40-0.22 is common to the entire Freccia
Rossa system, we hypothesise that it is the remnant of a high-velocity cloud
that has plunged into the Milky Way from the Galactic halo.
