Master Keaton Vol 3

From the VIZ Media edition

Taichi Hiraga Keaton, the son of an eminent Japanese zoologist and a wealthy English noblewoman, is an insurance investigator educated in archaeology and a former member of the SAS. He married his college sweetheart whilst at the University of Oxford, but they divorced after their daughter was born. Unaware of his abundant talents, he continues to struggle with life as he solves difficult cases...

Source: Anime News Network Encyclopedia