The husband of missing Melissa Casias says he fears for his safety and his family after filing for a restraining order against a private investigator involved in the high-profile disappearance and death investigation surrounding his wife.

Mark Casias claims he has been subjected to harassment, defamation, and threats linked to the ongoing scrutiny of his wife’s case, which has drawn widespread attention due to her work at Los Alamos National Laboratory and the circumstances surrounding her death.

Court documents filed in New Mexico allege that an Arizona-based private investigator, Thomas McNally, engaged in what Casias describes as an “escalating campaign” of public accusations and intimidation. A judge is expected to review the restraining order request in the coming weeks.

The dispute comes just weeks after authorities confirmed that skeletal remains discovered in the remote Carson National Forest belonged to Melissa Casias, who vanished nearly a year earlier. Her disappearance triggered extensive searches, intense public speculation, and nationwide attention due to her employment at the historic nuclear research facility linked to the Manhattan Project.

According to filings submitted in the 8th Judicial District Court, Mark Casias alleges that McNally has repeatedly accused him of involvement in his wife’s death and has encouraged online followers to monitor his movements and contact his workplace.

The restraining order petition also claims that McNally attempted to reach members of Casias’s family through blocked numbers and posted personal details online, contributing to what Casias describes as a growing climate of fear.

Among the alleged statements cited in court documents is a message directed at Casias that read: “No one is safe, Mark. Confess your sins.” Another post referenced in filings reportedly mocked Casias after he was seen in public following the discovery of his wife’s remains.

The case surrounding Melissa Casias has remained deeply complex since she was reported missing on June 26, 2025, after dropping her husband off at work and returning home alone. Her belongings, including her vehicle, purse, keys, and phones, were later found at the residence.

Investigators also noted that both of her mobile phones had been reset to factory settings prior to her disappearance, a detail that fueled speculation during the early stages of the investigation.

For months, law enforcement agencies conducted extensive searches across northern New Mexico with limited results. Eventually, a breakthrough came when hikers discovered skeletal remains in a rugged section of Carson National Forest, approximately six miles from the Casias residence.

Melissa Casias was later officially identified by New Mexico State Police, bringing a tragic end to the months-long missing persons case. A handgun was recovered near the remains, though officials have not confirmed how or when it was placed there.

The New Mexico Office of the Medical Investigator continues to assess the cause and manner of death, and authorities have not announced any suspects or persons of interest.

The investigation has also become a focal point for online theories, including speculation about possible connections to national security work at Los Alamos National Laboratory. However, private investigator Thomas McNally has publicly rejected those theories, insisting the case is unrelated to classified activity.

In earlier interviews, McNally said attention should remain focused on the personal circumstances of Casias’s life rather than speculation involving government programs or sensitive research work.

“What the attention should be on is that there’s a 53-year-old woman who’s missing and has a family who love her,” he previously said, urging the public to avoid unfounded theories.

McNally has also repeatedly stated that there is no evidence linking Casias’s disappearance to her employment, describing such suggestions as misleading and harmful to the investigation.

But according to Mark Casias’s court filing, the private investigator crossed a line by publicly suggesting he may have been involved in his wife’s death. The petition argues that McNally’s statements have fueled online harassment and placed his family at risk.

The filing also claims McNally contacted Casias’s employer, shared personal information online, and encouraged others to monitor his activities, escalating tensions between the two sides of the investigation.

As part of the restraining order request, Casias is asking the court to prohibit McNally from contacting him or his family, approaching his home or workplace, communicating with his employer, or publishing further statements he alleges are defamatory.

The legal conflict adds another layer to a case that has already drawn widespread public attention. Since the identification of remains, the focus has shifted from search efforts to determining how and why Melissa Casias died.

Family members have expressed frustration over the lack of clear answers and the continued uncertainty surrounding the circumstances of her death. They have also questioned whether all relevant evidence has been properly evaluated by investigators.

Casias’s daughter has previously raised concerns about the significance of the handgun found near the remains, noting that her mother did not typically carry firearms. Investigators have not commented on whether the weapon is believed to be directly related to the death.

Meanwhile, supporters of the Casias family say they remain committed to finding answers, even as legal disputes and online speculation continue to swirl around the case.

Relatives have said they intend to continue pursuing justice and clarity, emphasizing that the discovery of remains has not resolved the deeper questions surrounding what happened in the months after her disappearance.

Authorities have confirmed that no arrests have been made and the investigation remains active. Officials are continuing to examine forensic evidence, digital records, and witness statements as they work to reconstruct Casias’s final movements.

For now, both the legal battle between Mark Casias and the private investigator and the unresolved findings of the medical investigation ensure that the case remains open, complex, and closely watched across New Mexico and beyond.