Witnesses reported finding unidentified remains in Killeen, Texas, over the weekend, said police.
A search for Guillen is ongoing.
Authorities believe foul play is involved in both Guillen’s and Morales’s disappearances. Officials are not sure whether the two cases are connected.
The Army’s Criminal Investigation Command said officials are “doing everything possible” to find the woman.
“This is not just a law enforcement investigation of a missing person, but a full-scale operation to find one of our own and bring her back. There is obviously investigative information we cannot share with the public to protect the integrity of the ongoing investigation. We will not stop until we find Vanessa and we ask that anyone with information to please do the right thing and contact Army CID,” officials said.
A $25,000 reward and $50,000 reward is being offered for information about Morales’s death and Guillen’s case, respectively.
People who may have information can call the Army Criminal Investigation Command Special Agents at 254-287-2722 or the Military Police Desk at 254-288-1170.