Geng was said to have gained entrance into the residence by jumping over the fence, and the sneaked into his target’s room.
The deceased, a graduate of Agriculture Science from Kampala University in Uganda, was a member of the National Youth Service Corps (NYSC) in Sokoto.
Geng had a relationship with Ummita for about two years before she settled for another man within the city.
But she returned to her family home after the marriage crashed. Geng, who is yet to get over his heartbreak, tracked Ummita and allegedly stabbed her to death.
Public Relations Officer, Kano Police Command, SP Abdullahi Haruna-Kiyawa said the report of the preliminary investigation would be made public soon.
Geng is in the custody of the Police Criminal Investigation Department (CID) after operatives saved him from mob action.