Billionaire businessman Humphrey Kariuki resigns to focus on probe Wednesday, August 14th, 2019 00:00 | Alvin Mwangi By Alvin Mwangi Humphrey Kariuki. Photo/FILE Notice: Undefined offset: 0 in /home/mediamax/httpdocs/staging.pd.co.ke/wp-includes/class-wp-query.php on line 3377