Patrick Mumo Ngenge allegedly committed the heartless crime on October 20, 2021, in Mbooni-Makueni county.
The eldest son of the octogenarian met her struggling in pain while complaining of waist pains.
Kenya’s Directorate of Criminal Investigations has issued a statement confirming the incident.
“She tearfully narrated her harrowing ordeal in the hands of her younger son Patrick Mumo, 45, who forced his way into her bedroom at around 8:00 pm as she slept and subjected her to the beastly act,” part of the statement said.
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The elderly woman was rushed to Kisau Sub-county hospital in serious condition and is currently on admission. Doctors’ examination of the woman confirmed that she has indeed been raped.