The content originally appeared on: Trinidad and Tobago Newsday News File photo/David Reid YVONNE WEBB A Princes Town mother who injected her crying baby girl with a poisonous substance to shut her up is now in police custody for her murder. The incident is said to have occurred at Princes Town on Wednesday evening. Preliminary reports indicate the mother, of Busy Corner, New Grant, became frustrated with the baby girl's uncontrollable crying and injected her to get her to stop. […]