The 20-year-old suspect, Chitere Okoronkwo, was nabbed by operatives of the Special Anti-Robbery Squad (SARS) on Monday at Ama-Wire Urratta in the Owerri North Local Government Area of the state.
Okoronkwo was arrested in connection to the murder of 24-year-old final year student who was shot dead in August 2018.
Imo state police commissioner, Dasuki Galadanchi, said the deceased had been facing threat to his life after his relationship with the suspect went sour.
"When their relationship got sour and ended, the girl demanded compensation. The deceased, due to persistent threats to life before being assassinated, had paid N1.8m for shop rent and N2m for interior decoration of the shop to the estranged girlfriend.
"Not done with the threats, she demanded N3m, which the deceased gave through a lawyer. Before the money was finally paid to the lady, he was murdered inside his Mercedes SUV," Galadanchi stated.
The police boss said the suspect fled to South Africa after the incident. Okoronkwo confessed that she told a guy that she wanted the victim dead following their misunderstanding.
Galadanchi added that the suspect will be charged to court as soon as investigation on the matter is concluded.