Context : Previous studies have shown that the kinematics of the field elliptical galaxy NGC 7507 do not necessarily require dark matter .
This is troubling because , in the context of \Lambda CDM cosmologies , all galaxies should have a large dark matter component .

Aims : Our aims are to determine the rotation and velocity dispersion profile out to larger radii than previous studies , and , therefore , more accurately estimate of the dark matter content of the galaxy .

Methods : We use penalised pixel fitting software to extract velocities and velocity dispersions from GMOS slit mask spectra .
Using Jeans and MONDian modelling we then produce models with the goal of fitting the velocity dispersion data .

Results : NGC 7507 has a two component stellar halo , with the outer halo counter rotating with respect to the inner halo , with a kinematic boundary at a radius of \sim 110 ^ { \prime \prime } ( \sim 12.4 kpc ) .
The velocity dispersion profile exhibits an increase at \sim 70 ^ { \prime \prime } ( \sim 7.9 kpc ) , reminiscent of several other elliptical galaxies .
Our best fit models are those under mild anisotropy which include \sim 100 times less dark matter than predicted by \Lambda CDM , although mildly anisotropic models that are completely dark matter free fit the measured dynamics almost equally well .
Our MONDian models , both isotropic and anisotropic , systematically fail to reproduce the measured velocity dispersions at almost all radii .

Conclusions : The counter rotating outer halo implies a merger remnant , as does the increase in velocity dispersion at \sim 70 ^ { \prime \prime } .
From simulations it seems plausible that the merger that caused the increase in velocity dispersion was a spiral-spiral merger .
Our Jeans models are completely consistent with a no dark matter scenario , however , some dark matter can be accommodated , although at much lower concentrations that predicted by \Lambda CDM simulations .
This indicates that NGC 7507 may be a dark matter free elliptical galaxy .
Whether NGC 7507 is completely dark matter free or very dark matter poor , this is at odds with predictions from current \Lambda CDM cosmological simulations .
It may be possible that the observed velocity dispersions could be reproduced if the galaxy is significantly flattened along the line of sight ( e.g .
due to rotation ) , however , invoking this flattening is problematic .