For Lucy Njambi Nyagiko, what began as a marriage eventually became a relationship marked by fear, conflict and allegations of violence.
Her decision to leave her husband would ultimately be followed by one of the most horrific murder cases heard at the High Court in Kiambu.
Njambi was married to Samuel Ndung’u Njoroge as his second wife. However, the relationship deteriorated over time, with evidence presented in court indicating that she had complained to relatives about how she was being treated.
Family members told the court that Njambi had spoken about being assaulted by Njoroge. Her grandmother, Margaret Gachambi, testified that Njambi had complained that her husband had beaten her on several occasions.
The situation became so serious that relatives intervened in an attempt to resolve the marital dispute. Njambi eventually moved away from the matrimonial home, seeking distance from the troubled relationship.
But according to the prosecution's evidence, the separation did not end the conflict.
On November 27, 2017, Njambi went to the home of her aunt, Fidelis Muthoni Njuguna, in Kawangware. She was reportedly distressed and spoke about her problems with Njoroge.
During their interactions, Njambi expressed fears about what might happen to her. She also asked her aunt to take care of her young son should anything happen to her.
That warning would later assume chilling significance.
On January 24, 2018, Njambi left her apartment in Thindigua, along Kiambu Road, leaving her four-year-old son with a nanny. It was the last time her family would see her alive.
The High Court later found that Njoroge had played a role in luring her into a vehicle. Njambi was driven to the Magumoini area, off the Kiambu-Ruiru Road.
There, she was subjected to a brutal attack.
Court evidence showed that Njambi was sexually assaulted and had sulfuric acid poured on her body. The corrosive substance caused extensive burns, leaving her critically injured before she was abandoned.
A woman in the area later discovered Njambi in a severely injured condition. She was reportedly naked and suffering from serious burns.
Good Samaritans rushed to help her, pouring water over her body to ease the effects of the acid before she was taken to Kiambu Hospital. She was later transferred to Kenyatta National Hospital as doctors fought to save her life.
But her injuries proved too severe.
As she underwent treatment, Njambi was able to provide information that helped investigators piece together what had happened. Statements she made during her final days became important evidence in the murder trial.
Investigators also recovered a bottle containing remnants of acid from Njoroge's vehicle. Government analysts later established that the substance was sulfuric acid. Phone records, CCTV footage and other circumstantial evidence further strengthened the prosecution's case.
After a lengthy trial involving 38 witnesses, the High Court convicted Njoroge, Joyce Njambi Mungai and Wilson Mwangi Munyua of murdering Njambi.
On April 12, 2024, the three were sentenced to 30 years in prison each.
Justice Joel Ngugi described the killing as a case of femicide and intimate-partner violence. The court found that the attack had involved planning, extreme physical suffering and an attempt to conceal the crime.
For Njambi's family, however, the court judgment could not erase the loss.
A mother, a daughter, a relative and a young child's parent was gone.
Her story remains a grim reminder of how domestic conflict and violence can escalate with devastating consequences—and how warnings from victims must never be ignored.