PHILADELPHIA (WPVI) -- Authorities have identified the suspect who is accused of shooting a 7-month-old baby boy on Thursday night in Philadelphia. Police have arrested Dominique Billips, 28, for allegedly shooting the young child on the 4000 block of Meridian Street in the city's Holmesburg neighborhood. Disturbing video obtained by Action News shows the gunman walking up and opening fire on a baby and his parents outside of a home. In the video, the child's mother can be heard repeatedly yelling, "My baby," after the shots were fired. "You knew they had a stroller, what makes you walk up to...