A 21-year-old university student, Margaret Wambui, died after falling from the 22nd floor of Altura Apartments in Upper Hill, Nairobi, on July 19, leaving her family searching for answers.

• Margaret Wambui, a student at Murang’a University, fell from the 22nd floor.
• Investigators are questioning a security guard and seeking a man last seen with the student.
• Her handbag, with her phone and uniform, was found on the rooftop, deepening the mystery surrounding her death, which is classified as suicide, accident, or murder.