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FREDERICK, Colo. — Christopher Watts, the man charged with killing his wife and daughters and dumping their bodies at an oil work site, taped a video presentation six years ago about saving or abandoning relationships.

A YouTube video posted in April 2012 shows Watts giving a PowerPoint presentation that he titled “Communication Speech, Relationship Deterioration and Repair.”

Watts opens the presentation by saying it is for a course he was taking.

“Sometimes you maybe make promises that turn into major betrayal,” Watts said in the video. “Is it a necessity for me to stay in this relationship? According to my research, sometimes a necessity could be children.”

Then he speaks of infidelity possibly with someone at work as one reason relationships fail.

“If you met somebody at work or a new friendship has occurred and as it goes on, you see that, okay maybe this relationship has more potential than the relationship I have,” Watts said in the video.

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Prosecutors say Watts was having an affair with a co-worker before he was arrested last week in the slayings of his wife, Shanann Watts, and their two children, ages 3 and 4.

“In today’s society with the prevalence of social media, digital content, anything goes,” legal analyst Chris Decker said.

“Would a tape made by a suspect, many, many years before be relevant? Would it be admissible? It’s impossible to tell. It’s too soon to know.”

According to court documents, Watts admitted to authorities that he killed his wife “in a rage,” but blames her for the death of their daughters.

Decker said the fact Watts confessed to police to killing his wife could prove strong for the prosecution.

“An admission by a suspect dramatically increases the chances of a successful prosecution. It often times dramatically changes the nature and type of defense that would be presented,” Decker said.

“We don’t know, or I don’t know the particulars of the circumstances surrounding that statement whether it may be something the defense will challenge and say it was obtained unlawfully or unconstitutionally.”

Decker said it’s also possible the defense could claim it was a false admission. Time will tell.

Watts is formally charged with nine felony counts, including three counts of first-degree murder after deliberation. He has not entered a plea.