That means no suspect has been successfully convicted of the murder in a court of law.
Let's begin below;
Julie Ward-Sep 1988
Julie, who was a publishing assistant, was last seen alive in Kenya on September 6, 1988, after she travelled to the Maasai Mara.
Julie had decided to drive to Sand River camp to recover her camping equipment but that is where things got murky.
She was allegedly gang-r*ped, murdered, and then her body was set on fire. Simon Makallah, the former head warden of the Maasai Mara game reserve, was identified as a suspect but was cleared in 1999. Her murder still remains a mystery.
Mercy Keino-June 2011
The body of Mercy Keino, a former student of the University of Nairobi student was found along Waiyaki Way. By the time the body was found, it had been run over by several vehicles.
Before she met her untimely death, she attended a party at Wasini Luxury Homes where former governor William Kabogo was also in attendance.
The politician later emerged as a person of interest but was later cleared of any wrongdoing.
Careen Chepchumba-February 2012
The 26-year-old KPLC employee was found dead in her apartment at Santonia Court in Kilimani. She was found bleeding in her eyes and neck muscles due to pressure applied to her neck by an unknown assailant.
Media personality Louis Otieno became the main suspect, but police maintained that there wasn't enough evidence to sustain a trial against him.
Police officer arrested after shooting wife dead in Eldoret