THE ARREST | WHAT WE KNOW | THE VICTIMS | THE INVESTIGATION | UAB FOOTBALL PLAYER AFFECTED | WITNESS | THE SCENE | HUSH LOUNGE STATEMENT | BIRMINGHAM MAYOR | CITY COUNCIL | SB3 | BUSINESSES | GLOCK SWITCHES | SCLC | WOODFIN AT THE WHITE HOUSEAn arrest has been made in the deadly mass shooting that claimed the lives of 4 people and left 17 others injured in Birmingham last month.It happened outside Hush, a hookah and cigar lounge on Magnolia Avenue in Five Points South. That is an entertainment district with restaurants and nightlife. Here’s what we know: A shooter or shooters opened fire just after 11 p.m. on SaturdayAt least four people were killed and 17 more injured in Five Points South The victims have been identified Five people remain in the hospital as of Monday morning; 12 people have been releasedOne suspect is in custody at …