However that is only 1% of an estimated $2bn (£1.53bn) worth of public money involved in high profile corruption cases.

In recent years high-profile politicians and public servants have been arrested and prosecuted for corruption, but none has been convicted yet.

Mr Haji spoke to the BBC’s Ferdinand Omondi in Kenya's capital, Nairobi, about his hopes of securing a high-status conviction this year - a challenge put to prosecutors publicly by President Uhuru Kenyatta on Monday.