Veronica Martinez known by her alias Marta Del Sol is a fictional character from the American soap opera Dallas, played by Leonor Varela. The characters of J.R. Ewing (Larry Hagman) and John Ross Ewing (Josh Henderson) feature heavily in Marta's storyline. Marta partners with the duo and they attempt to steal the Southfork Ranch from Bobby Ewing (Patrick Duffy). Marta falls in love with John Ross and Varela said that it is one of Marta's more genuine moments. But she believed that John Ross would never be able to maintain the same respect for her. With similar personalities they are well matched; but John Ross' relationship with Elena Ramos (Jordana Brewster) causes Marta to become jealous and obsessive. Varela's departure was announced in July 2012. Marta was murdered and John Ross wrongly accused of the crime. Varela's casting was announced in July 2011. She wanted to join the show because the legacy it had created. She thought Marta was to be an environmentalist and do-gooder, but she soon learned that Dallas writers had created a manipulative villain. Varela has stated that her character is not one-dimensional and is complex with both strengths and weaknesses. Marta also has bipolar disorder and Varela researched the condition via vlogs and movies. She decided that a "subtle nuance" of the illness better suited Marta. Cynthia Cidre, who produced and wrote for Dallas created an "in-depth background" for the character. This and Marta's villain status helped gain Varela more freedom in her portrayal. Various critics have analysed the character's mental state. Most have concluded that Marta is a "crazy" character. Digital Spy's Alex Fletcher opined that Marta became more "dark and ludicrously disturbing" with each episode. Terry Linwood from D Magazine called her an "all-around psycho" and bunny boiler. But Jarett Wieselman from Entertainment Tonight said that Marta epitomised Dallas' key themes of "shocking revelations, devious double-crosses and smoking hot stars".