Egbunike who hails from Onitsha, Anambra State, reportedly slumped and died in his office in Abuja in the late hours of Tuesday.
Police officers have gathered at his official residence in Maitama in preparation for his burial, an official said.
“It is very tragic that he died after battling a protracted ailment that left his neck swollen for many years,” a police source said. “He was previously flown to London for treatment, but he did not recover well before returning to work.”
Until his death, Egbunike headed the Special Investigation Panel constituted by the Inspector General of Police, Usman Baba, to investigate the suspended head of the Police Intelligence Response Team, Abba Kyari, over money laundering allegations.