PORTLAND, Texas -- Police have released a sketch of a suspect in the shooting of a South Texas couple that left one dead and another wounded last month.

With help from a witness, Portland police described the alleged gunman as a skinny male in his 20s, weighing 140 pounds. The sketch was released late Wednesday.

Mary Kristene Chapa, 18, and Mollie Judith Olgin, 19, were both found June 23 in a park with gunshot wounds to the head. Olgin died from her injuries and Chapa remains hospitalized.

The two women were involved in a relationship, according to family and friends, though it's not clear if that was the motive for the shootings. So far, the incident has not been ruled a hate crime.

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