  We have analyzed new, archival and published high resolution radio and X-ray
observations of a sample of composite LINER/HII galaxies known to exhibit
AGN-like properties. Five of the 16 AGN candidates have milliarcsecond-scale
detections and are found to display a compact, flat spectrum, high brightness
temperature radio core, four of which also exhibit extended radio emission.
Five of the eight AGN candidates with available high resolution X-ray
observations were found to possess a hard X-ray nuclear source, two of which
have no milliarcsecond radio detection. The combined high resolution radio and
X-ray data yield a 50% detection rate of low luminosity AGN among the AGN
candidates, which translates into a 12% detection rate for the entire composite
LINER/HII sample. In the sources where the AGN has been unambiguously detected,
the ionizing power of the AGN is not sufficient to generate the observed
emission lines, unless the hard X-rays are heavily obscured. We attempt to
apply a canonical advection-dominated accretion flow (ADAF) and jet model to
the sample sources in order to explain the observed radio and X-ray emission.
While ADAFs may be responsible for the observed emission in submillijansky
radio cores like NGC 7331, they do not appear consistent with the radio
emission observed in the milliarcsecond-scale radio detected cores; the latter
sources are more likely to have an energetically important contribution from a
radio-emitting jet.
