Overview

• Luz Pineda, 32, pleaded not guilty in Roxbury District Court to assault and battery on an elder or disabled person with injury.
• A judge imposed $5,000 bail with orders to avoid the victim and witnesses and to stay off all MBTA property.
• Investigators said bystander cellphone footage was corroborated by onboard surveillance video and community tips that identified the suspect.
• Prosecutors described injuries that included a concussion, a cut near the eye, a broken blood vessel, and memory loss, and alleged Pineda kicked the victim’s cart before the shove.
• The Commonwealth said the confrontation began over a blocked exit as Pineda tried to leave with a 3-month-old, while the defense noted she was returning from a pediatric appointment.