The Kansas City Star is reporting, from a source , that the altercation between Chiefs linebacker Jovan Belcher and his girlfriend began when she came home late from a Trey Songz concert.

A friend of the woman killed today by Chiefs linebacker Jovan Belcher said the couple argued in the early morning hours after the woman was out late attending Friday’s Trey Songz concert at The Midland.

The friend, who asked not to be identified, said Belcher confronted his girlfriend when she returned home about 1 a.m.

Police have not confirmed the identity of the girlfriend. Another friend told The Star she was a student at Blue River Community College.

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