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Lupe and Mayra Guillen spoke with Eyewitness News reporter Steve Campion, and they said "actions trump condolences."
The family wants Fort Hood leadership held accountable, a detailed account of what happened to their sister and federal law changed to allow service members the option to report sexual harassment allegations to a third-party agency.
"From the start, we lost trust with them (the Army) from the very beginning," said Mayra. "The story they gave us is completely... I don't even know what the right word for it is, but no one believes that story."
They said the Army returned Vanessa's personal belongings to the family Thursday. The family vowed to continue their fight for the truth.
"You have to keep fighting," said Lupe. "You have to keep pushing no matter what."
Supporters and family members plan to return to Fort Hood on Friday afternoon for a weekly rally outside the East Gate.
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