First found dead was an unknown male, killed (on Monday, September 21, or before 6 am Tuesday, September 22, 2015). The apparent suspect was Mark Constantino, 56, well-known from two paranormal investigation television programs. Gone and missing was his likewise well-known wife, Debby, 52.
The Nevada murder-suicide took place a week after a similar event, when on September 14, a love triangle murder-suicide at Delta State University in Mississippi, filled the media for a day. Earlier, on another Monday, September 7, 2015, Patrick Derr, 47, shot his enstranged girlfriend Stacy Pennington, 46, then killed himself, in front of the Jigger Shop Ice Cream Parlor, Mount Gretna, Lebanon County, Pennsylvania.
The Constantinos' incident came as a surprise to their Facebook friends and television fans. But perhaps there was a hint of this which was known to their closer friends, because domestic abuse was part of the background to this unfolding story.
At about 6:30 am on Tuesday, September 22, 2015, in the 2300 block of Escalera Court in North Reno, Nevada, a woman discovered her deceased male roommate. She informed the Reno Police Department and then let them know that her other roommate, Debby Constantino, was missing. She told them she was concerned for Constantino's safety.
Police arrived there, and were shot at through the door. They soon discovered Debby Constantino was inside, and being held hostage by her estranged husband Mark, 53, in their daughter's house. He shouted a warning through the door. Police suspected he had killed the male in Reno, and was the person who shot at them upon arrival.
After hours of negotiating between Mark and police from Reno and Sparks, around 1:30 p.m., Sparks' SWAT team exploded a flash device near the door, entered, and found Mark and Debby dead inside the apartment. Mark had apparently shot his wife, whom he held hostage. Then Mark killed himself.
Channel 2 News obtained court records that show Mark and Debby Constantino had a violent history of interactions.
In March of this year  Debby Constantino was arrested at a home in north Reno. According to the records she and mark were fighting over money when she scratched him. It escalated and she allegedly sliced his arm with a kitchen knife. She was charged with domestic violence and battery with a deadly weapon. She was never able to have her day in court.
Then just six weeks ago, Mark along with their daughter Raquel, allegedly went to a home, pulled Debby out of a car by the neck and then dragged her inside. Documents accuse Raquel and Mark of beating Debby to the point of breaking her nose and causing bleeding. Records say Mark then strangled her., causing her to nearly pass out.
Raquel was charged with kidnapping, domestic battery, battery and vehicle burglary.
Mark was charged with kidnapping, domestic battery by strangulation and domestic battery.
We also heard from many of you on our social media sites asking why Mark Constantino was let out of jail after being accused of kidnapping Debby. In the court documents we obtained, it shows that kidnapping is usually a 'no bail' charge, but in this case both Mark and Raquel were granted bail by a local judge. Mark's bail was set at $40,000, which was allowed to be paid by bond... and Raquel's was set $30,000, also bondable.
Both Raquel and Mark were ordered to stay away from Debby Constantino. Source.
"You respect people until they disrespect you. They're dead, and Lord knows we're all going to be dead. We may meet in the same room; why not be nice to them?" she said.
Mark and Debby Constantino were both paranormal investigators, specializing in EVP, Electronic Voice Phenomena, or ghost voices on tape. The Constantinos rose to celeb status by appearing on the Travel Channel series Ghost Adventures, where they were appeared at least four times as EVP experts to assist the team’s paranormal investigations. They also were featured on a spinoff, and made guest appearances at paranormal conferences nationally, making many friends on the con circuit.
Constantine is a 2005 supernatural action-thriller film directed by Francis Lawrence as his feature film directorial debut, starring Keanu Reeves as John Constantine, with Rachel Weisz, Shia LaBeouf, Tilda Swinton, and Djimon Hounsou. With a screenplay by Kevin Brodbin and Frank Cappello, the film is loosely based on Vertigo Comics' Hellblazer comic book, which is also a part of and run by DC Comics, with plot elements taken from the "Dangerous Habits" story arc (issues #41-46) and the "Original Sins" trade paperback. The character of John Constantine was introduced by comic book writer/creator Alan Moore while writing the Swamp Thing, first appearing there in June 1985.
In 1988, the character of John Constantine was given his own comic book title, Hellblazer, published by DC Comics under its Vertigo Comics imprint. The “Dangerous Habits” story arc of Hellblazer was written by Garth Ennis in 1991, on which the film is partly based. The film, which was met by film critics with mixed reactions, portrays John Constantine as a cynic with the ability to perceive and communicate with half-angels and half-demons in their true form. He seeks salvation from eternal damnation in Hell for a suicide attempt in his youth. Constantine exorcises demons back to Hell in a bid to earn favor with Heaven but has become weary over time. With death looming, he helps a troubled police detective learn the truth about her sister's death while simultaneously unraveling a much larger and darker plot. Source.
Also ~ On October 4, 2013, African-American Marine Vietnam veteran John Constantino, 64, died by self-immolation on the National Mall in Washington, D.C.; see more.