A tragic scene unfolded in Pennsylvania on Monday as three individuals were discovered dead in a residence following a tense standoff that concluded with an arrest.

According to a report by PhillyBurbs.com, Kevin Castiglia, aged 55, is now in custody facing charges of terroristic threats, simple assault, possession of an instrument of crime, and reckless endangerment.

Interestingly, he has not been charged with the deaths of his parents, Judith Castiglia, 84, and Fred Castiglia, 90, nor his sister, Deborah Castiglia, 53, who were all found deceased within the home, as detailed in court documents.

Documents reveal that Deborah Castiglia’s boyfriend became concerned when he had not heard from her since Saturday. On Sunday, he attempted to locate her at her Doylestown residence but was unsuccessful. Noticing her car parked at her parents’ house, he decided to visit there instead.

Upon reaching the house, he knocked but received no response. Observing that the lights were off, he decided to leave. However, his concern prompted him to return on Monday, where he was greeted at the door by Kevin Castiglia, who was dressed in a bathrobe. When asked about Deborah, Kevin mentioned she might have gone on vacation.

In a shocking twist, Kevin then allegedly brandished a “large Psycho-type chef’s knife” and threatened the boyfriend, warning him, “Don’t ever come here again or I will kill you.”

The boyfriend left and called police.

Police arrived and initially got no answer to their knocks at the door, but eventually Castiglia answer the door, still wearing the bathrobe and now armed with two knives.

Castiglia spoke incoherently, the documents say, and when he pointed the knives at the officers, they deployed tasers unsuccessfully. Castiglia pulled the taser probes out of his body, slammed the door shut and locked it, the documents say.

Members of the South Central Emergency Response Team were called to the scene and made forced entry, finding Deborah Castiglia dead in the kitchen. Her parents were dead in the home’s lower level.

They located Kevin Castiglia, still armed with knives, who ran to a second floor bedroom where he barricaded himself.

He was eventually taken into custody after an hours-long standoff later Monday night.

Police said charges against him will likely be upgraded.

Property records show that the family had been longtime members of the community, living there since 1970.