The politician also had other properties that he had not mentioned in the will. The highest-valued property was worth Sh450 million.
He had at least Sh2.51 million in Credit Bank and Equity Bank. The total estimate of his wealth that had not been indicated in the will was Sh1.6 billion.
Meanwhile, Keen had at least 10 properties in Nairobi County that he had transferred to Resson Gardens Limited.
Court records read that he had no known liabilities.
In his will, he had bequeathed his daughter Silole Wangui his Standard Chartered Bank and Safaricom shares.
At the same time, he directed that the money in the bank should be used for education and issues that his children or wives could not be able to foot.
He left Rosemary Sanau, Pamela Siola, Anthony Simel and Somore Sam and one of the trustees as signatories.
The money at the bank ended up being yet another battle between his granddaughter Zola Sinet, her father Edward Meitamei on one hand and the signatories.
Sinet and her father asked the court to order the signatories to remit Sh4.8 million for her education. However, they opposed the prayer saying that they knew that she had completed her university education.
Justice Aggrey Muchelue agreed with the signatories.
"Has she repeated? Has she graduated? What happened to her evidence that she was completing her studies? Neither her nor her father responded by a further affidavit," said Justice Muchelule.