Shriya Patel's trial began on March 4 in Austin, Texas, with prosecutors accusing her of luring her husband Bimal into the bathtub for a massage, dousing him with gasoline and then setting him ablaze before shutting him in the bathroom.
Bimal Patel, 29, died at the burn centre of the San Antonio Military Medical Centre, nearly five months after the April 17, 2012 incident.
Both sides have rested and closing arguments are expected today after state and defence lawyers work out the final charge against Shriya.
The defence exhibits also include a text message in which Bimal says he received a letter about problems with his tax return, and says, "I'm fine but at the same time I feel like I'm about to snap".
Prosecutors played security camera footage that captured Shriya alone inside a Walmart purchasing what a receipt showed to be two candlesticks, nylon rope and masking tape.
Shriya faces life in prison without parole if convicted, the Austin American-Statesman reported.
Her lawyers are arguing that her husband killed himself and forced her to help.
Bimal had met Shriya through an arranged marriage service in India. The two wed, but it took about a year for her to get a passport to come to the US, and she had only been in the country a week when she decided to kill her husband, the prosecution said.
Bimal's friends testified this week that Shriya had confessed to marrying him just to make her former lover jealous.
