A 27-year-old Kenyan man who chopped off his ex-girlfriend’s hand after she rejected him was charged with causing her grievous harm.    The suspect, Joel Okongo is accused of severing the high school student’s left hand in Silanga area of Kibera in Nairobi on April 22, 2022.    Okongo has also been charged with threatening to kill the victim’s brother after allegedly warning he would chop off his head.    Okongo and the minor were previously in a relationship but they broke …