The Texas Senate unanimously approved a measure this week to establish September 30th as Vanessa Guillén Day. The date commemorates the life of a 20 year-old U.S. Army Specialist who was killed by a fellow soldier while stationed at Fort Cavazos in Central Texas.The Texas Senate unanimously approved a measure this week to establish September 30th as Vanessa Guillén Day. The date commemorates the life of a 20 year-old U.S. Army Specialist who was killed by a fellow soldier while stationed at Fort Cavazos in Central Texas.