Kenyan police have offered a reward of 1 million shillings ($7,700; £5,700) for information leading to the arrest of suspected serial killer Collins Jumaisi Khalusha, more than a year after he escaped from their custody.

Khalusha was the prime suspect in the murder of more than 40 women whose mutilated bodies were discovered in a disused quarry that became a dumpsite in the capital, Nairobi.

Shortly after his arrest, he escaped from custody, along with 12 others, after reportedly cutting through a wire mesh roof and scaling a perimeter wall.

This incident caused widespread outrage, and police are facing renewed backlash over their failure to locate Khalusha more than a year later.

Many Kenyans have questioned how he could have escaped on 20 August 2024 from what is regarded as one of the most secure police stations, located near the US embassy and the UN offices in the capital.

Khalid Hussein, an activist closely following the case, claimed that the police were not serious about solving the murders of the women previously identified as aged between 18 and 30. He alleged that some bodies were still inside the quarry pits, rotting.

Mr. Hussein suggested that the Directorate of Criminal Investigations (DCI) announced the reward in response to a documentary by the local Citizen TV station about the police's inaction.

The DCI stated in a post on social media that the 1 million shillings reward would be given to anyone who provides credible information that will assist in the re-arrest of the suspect.

Several policemen were arrested last year for allegedly aiding Khalusha's escape, but they were later released on bail. Khalusha had reportedly confessed to his crimes, but his lawyer claimed his confession was obtained under duress.

As the investigation continues, the Kenyan public remains vocally frustrated with the authorities for their handling of the case and the ongoing search for Khalusha.