(18:40) GONZALES – A 47 year-old man has pleaded “Not Guilty” to killing his mother over this past weekend. 79 year-old Maria Rangel Arias suffered a fatal slash to her neck on Saturday, while she was in her home in Gonzales. Juan Manuel Garcia Rangel, who lived with his mother on Venice Way, has been charged with Felony Elder Abuse as well as Murder.