The News Agency of Nigeria (NAN) reports that Collon, an engineer, was working with the firm handling the Katsina Wind Mill Power project, when he was abducted at his residence in October 2012.
Two people, a security guard and his friend, were shot dead in the process of his abduction, while the Divisional Police Office in Rimi was set ablaze by the kidnappers.
Briefing newsmen on Sunday, Kaduna State Commissioner of Police, Mr Olufemi Adenaike, said the 63-year-old French man was released by his abductors in Zaria on Saturday, after his initial incarceration in Katsina and Kano.
According to him, the kidnappers did not demand for any ransom since the man was kidnapped about a year ago.
He said Collon was dumped by the roadside at Dan Magaji in Zaria, from where he took a commercial motorcycle to the Dan Magaji police station.
Collon, accompanied by French embassy officials did not comment on the incident.
The commissioner said the man would be departing Nigeria for France immediately to reunite with his family. (NAN)