  The broad-line radio galaxy 3C120 is a powerful source of both X-ray and
radio emission including superluminal jet outflows. We report on our reanalysis
of 160 ks of Suzaku data taken in 2006, previously examined by Kataoka et al.
(2007). Spectral fits to the XIS and HXD/PIN data over a range of 0.7-45 keV
reveal a well-defined iron K line complex with a narrow Ka core and
relativistically broadened features consistent with emission from the inner
regions of the accretion disk. Furthermore, the inner region of the disk
appears to be truncated with an inner radius of r_in = 11.7^{+3.5}_{-5.2} r_g.
If we assume that fluorescent iron line features terminate at the inner-most
stable circular orbit (ISCO), we measure a black hole spin of a < -0.1 at a 90%
confidence level. A rapidly spinning prograde black hole (a > 0.8) can be ruled
out at the 99% confidence level. Alternatively, the disk may be truncated well
outside of the ISCO of a rapid prograde hole. The most compelling scenario is
the possibility that the inner regions of the disk were destroyed/ejected by
catastrophic instabilities just prior to the time these observations were made.
