Last Monday, six people were found in a house in the state of Oklahoma, in the south-central United States, and authorities announced who might be involved days later.

It would be about a convicted sex offender who later committed suicide, local police revealed.

“The evidence is that Jesse McFadden killed six people and then killed himself,” Okmulgee Police Chief Joe Prentice told reporters.

“Furthermore, I don’t know what his thought process was, whether he intended to do this, and if so, for how long,” Prentice said.

McFadden, 39, lived with his wife Holly McFadden, 35, and three children, ages 13 to 17. Two of her youngest daughter’s friends also died during the event, they were two teenagers, ages 14 and 16, who were the had gone to spend the night at the McFaddens’ house, according to local Fox 23.

Authorities do not know McFadden’s reason for carrying out the act and are ruling out finding it, as “the only people who know are not here anymore,” the police chief said.

The man was due to appear in court on Monday morning on charges of solicitation of a minor, but he failed to show up and a warrant was issued for his arrest and the incident was learned there. The case dates back to six years ago when he allegedly exchanged photos and videos with a minor in 2003 while serving a sentence for rape.

Jeanette Mayo, mother of Holly Guess McFadden, said her daughter was married to McFadden, whom she described as a “monster.”

“My daughter loved her children and yes she married the man she killed but was fooled by his charm,” she wrote on Facebook.