  This Research Note presents VLT B-band imaging of a candidate runaway
supermassive black hole that was recently discovered in HST/ACS F606W+F814W
imaging. The ACS data show an extremely thin, linear feature at z=0.964 that
points toward a compact galaxy at the same redshift. There is a gap between the
feature and the compact galaxy, which means that the proposed causal connection
between the two objects is not definitive. We show here that the linear feature
extends all the way to the compact galaxy in the B-band, with no gap. The
B-band morphology is difficult to reconcile with models where the compact
galaxy and the linear feature are independent objects, and in particular with
the proposal of Sanchez Almeida et al. (2023) that the linear feature is an
edge-on disk galaxy.
