The family did not print funeral programmes and nor did they give tributes.
Local preachers presiding over the funeral did not even introduce Ms Kiboi's mother or her siblings.
Only one tent was pitched in the compound, with less than 50 plastic chairs available.
No one was allowed to take photos using a camera as the family had asked the media to keep off.
“Most of her friends were scared that they would be arrested if they showed up for the burial. They only visited the city mortuary in the morning,” said a friend.
Ms Kiboi quit school in 2013, months after joining Form One at Gikindu Secondary School in Murang'a.
According to a former classmate of hers, the teenager dropped out of school after her principal punished her for something she had done.
She then moved to Kayole, Nairobi, to live with her mother.
At the time of her death, the teenager had moved out of her mother’s house and was living with her boyfriend, suspected to be a notorious gangster.
Neighbours of her family in Kambirwa who spoke to the Nation said the young woman often visited her grandmother in the village.
Police officers were trailing a gang of four, all male except for her, when they shot her and a colleague.