There is ulceration with chaotic pigmentation. A clue is that there are blue clods present and with his Hx of BCC's this is likely to be a BCC.
It looks like there is a central scar which is probably from someone doing a biopsy from this lesion in the past. Has it changed - who knows. There is a reticular pattern with thickened lines and in some places the lines are thicker than the width of the space between ( a clue to melanoma) The lesion is asymmetric with irregular pigmentation. It is likely that this is a Clarks nevus however it is a lonely lesion and a biopsy or close dermatoscopic followup would be reasonable.