The court emphasized that it is not enough to launch investigations without demonstrating that an offence has been committed or is reasonably suspected to have occurred.
The case had drawn attention in recent days, especially following Tuju’s dramatic arrest, which he claimed was carried out in a heavy-handed manner.
He had moved to court seeking protection, arguing that the actions taken against him were unjustified and violated his rights.
In his application, Tuju maintained that he was being targeted without proper legal grounds.
He questioned the basis of the investigations and asked the court to intervene, saying the process was causing unnecessary distress to him and his family.
The court agreed with his arguments, noting that the material presented by investigators did not meet the required legal threshold.
The judge pointed out that without a clear offence, continuing with the probe would amount to an abuse of the legal process.
Legal experts say the ruling sends a strong message about the limits of investigative powers.
They note that while police have the authority to investigate suspected crimes, they must operate within the law and respect individual rights at all times.
The decision is also seen as a reminder that courts play a key role in checking the actions of state agencies.
By stepping in, the court ensured that the rule of law is upheld and that individuals are protected from actions that may not be properly justified.
Following the ruling, Tuju welcomed the outcome, describing it as a victory for justice.
He expressed relief that the court had carefully examined the matter and found no basis for the investigations. He also reiterated his earlier position that he had done nothing wrong.
Despite the court’s decision, the matter may still attract public interest given Tuju’s high profile in Kenya’s political landscape.
Observers say the case highlights ongoing debates about the conduct of investigations and the balance between security concerns and personal freedoms.