He is expected in court on Friday morning where detectives will be seeking more time to hold him as the probe into the boy's death intensifies.
Ilyaas Abdikarim Ali Mohamud who went missing on Tuesday at around 2 pm was found dead in the school's swimming pool on Wednesday.
The deceased will be buried tomorrow at the Lang'ata cemetery.
Stay ahead of the news! Click ‘Yes, Thanks’ to receive breaking stories and exclusive updates directly to your device. Be the first to know what’s happening.