Inset: Matthew Regnier (El Paso County Sheriff's Office). Background: Police outside the Colorado Springs home where Matthew Regnier allegedly went on a deadly stabbing rampage with a "buck knife" (KRDO/YouTube).
A Colorado art teacher allegedly went on a deadly stabbing rampage with a "buck knife" made from an animal antler, plunging it into a man who later died and into two women on Halloween night, cops say.
Matthew Regnier, 33, of Colorado Springs, was found "fully naked and bloodied" while holding a 2-year-old child in his arms by responding officers, who were called to the scene in the 1400 block of El Paso Street just before midnight on Friday, according to an arrest affidavit obtained by Law&Crime.
Colorado Springs Police received multiple calls for a domestic disturbance that evening and were allegedly told by Regnier upon their arrival that he captured events leading up to the stabbing and during it with his cellphone in "selfie mode." He later claimed during police interviews that the attack was done in self-defense, according to the affidavit.
"Matthew repeatedly described a 'three on one' assault, wherein [redacted] was attempting to bite off his finger, [redacted] was attempting to strangle him, and [redacted] was attempting to rip off his penis and testicles," the affidavit alleges.
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Regnier told police that while the alleged assault unfolded, he reached into the closet and grabbed a "buck knife" and "defended himself," according to the affidavit.
The male victim, who is the aforementioned child's uncle, died early Saturday morning after being rushed to a local hospital. The female victims both survived the alleged attack. The victims' names are redacted from the affidavit and their relation to Regnier is unclear.
One of the women allegedly told police that Regnier was keeping her and the other woman away from the child after changing their diaper. Regnier admitted to cops that he didn't have a good reason for why the trio would attack him, according to the affidavit.
In the cellphone video that Regnier captured, he can be seen repeatedly holding the camera in "selfie mode" while one of the female victims was behind him on a bed, her arm seemingly around his neck, according to the affidavit. "Matthew was observed screaming about being choked and not being able to breathe, but repeatedly escaped from the supposed strangulation," the document alleges.
Regnier can be heard screaming "something about his testicles" before he begins to repeatedly stab the woman, according to police. Regnier was "completely naked and … covered in blood" during the assault, the affidavit says, noting how he allegedly began stabbing the other female victim as well.
The male victim entered the bedroom after hearing the women screaming and was immediately attacked by Regnier, according to cops. Regnier's cellphone video captures audio and video of the attack.
"Women are heard screaming as Matthew is observed repeatedly raising the large fixed blade knife and plunging it in the directions of [the man's] head and body," the affidavit says.
Police say they found the knife that Regnier used inside of the residence.
"The handle of the blade appears to be made from the antler of a deer or other game animal," the affidavit alleges. "The knife [appeared] to be consistent with the décor of the residence, which included several animal skins and mounted skulls."
Neighbors told local ABC affiliate KRDO that they saw Regnier outside the home handing out candy earlier in the night. Local officials confirmed to Law&Crime that Regnier is a former art teacher at the charter school Monument Academy who had his employment terminated over the weekend following his arrest.
The school district says he served as both an educator and a coach with the junior varsity soccer team at Palmer Ridge High School.
Regnier was taken into custody and charged with murder, attempted murder and assault. He was being held without bail at the El Paso County Jail with his first court appearance scheduled for Nov. 10.
