What led to Conor shooting Ann? Ann and Conor argued about him keeping a gun in the house. Conor and Ann were fighting because he wanted to end their relationship. Conor accidentally shot Ann because he didn't know how to operate the gun. Ann and Conor had been fighting for an extended period of time.

Ann and Conor had been fighting for an extended period of time.

Explanation:

Conor McBride, a tall 19-year old guy shot his girlfriend, Ann Margaret Grosmaire as a result of accumulated issues which they failed to resolve. They kept their grievances for two nights and two mornings which cumulated to the time Conor shot Ann. They have been fighting for an extended period of time.

When the incident took place, Conor walked into the Tallahassee Police Department to report his crime.