Gerda, Leonard, Valeria and Leslie were sat outside of the interrogation room.

The Chief waved his hand,"This is Theodore's Therapist; Working with him to help through the trauma and aiding us in the investigation.", the Therapist nods a politely, but professionally.
The Chief confirmed:
Victoria was the mother of Valeria, her husband was currently out of state.
David and Bethany was the mother and father of Leonard and Jody.
Luke was the father of Gerda, divorced and just got custody of Gerda's little brother from his ex wife.
And John was Leslie's father, also divorced from his ex wife.

"So; Your kids are our main suspects in the crime; Not only because of their history but also the degree how much they went for to hurt and potentially kill Theodore."
Victoria's throat felt tight, John looked like he might be sick, David looked ready to strangle someone and Luke look exhausted but concerned.
The Chief nodded to the Therapist, who brought a folder or two; All with Theodore's name.
"These folders detail Theodore's recovery, ups and down, information and key points: It helps us keep track."
Opening the second one, The Therapist showed very well made drawings.
"These 4 drawings are a very important: As you can see, each drawing is someone in a costume from a Witch, Skeleton, Astronaut and Ninja, you see the simple things that make it a costume and kids wearing it; The simple design, the strap on the mask and the Witch Mask Eye details.", The Therapist then flipped to a few pages and showed another,"And these. . . Are the most recent drawings.", pushing the pages forward, Victoria felt herself recoil, David's jaw tightened, and John and Luke looked stunned.
Once drawings of people in costumes, slowly morphed and twisted into actual monsters; The designs got more detailed, gone was any trace of people in costume; The Skeleton and Witch were the worst.
"We believe Theodore's method of coping is to separate the people from the mask, suggesting he wants this to be in the past, wanting there to be a chance for the guilty to change."
That was. . . Heartbreaking.
John frowned,"The Ninja hasn't changed much, just got more detailed. . .", "We believe the intensity of the drawing depends on how Theodore feels about them. Case in point, when asked about the Ninja. . .", the Therapist pulled out a voice recorder, hit play and sat back.

"So this Ninja?"
"Huh. . ."
"Are they, your friend?"
"I. . . I dunno. . ."
"You're very split on them?"
"C-cause. . . I want to believe they are. . . Friend, but they. . . Hurt me, and. . . I dunno, could you still be friends with someone even if they hurt you. . ."

The words, the question and Theodore's voice, smaller and more shakey than ever; Broken.
The Chief turned to the adults,"So, what were your kids up to on Halloween and what were they dressed as?", the adults looked at each other.
"Uhm. . . Valeria was dressed as a Witch, mask too; I can bring the mask to trace where I bought it."
"Leslie was dressed as an Astronaut, I can try find it."
"Gerda was a Ninja, she still had the props."
"Leonard had a Skeleton Costume with a mask but. . . We can't find it."
The Chief wrote that all down.

=

Meanwhile, The Chief's partner; Keith Nelson, searched around the Weather Station and the woods.
"Come in, Officer Nelson."
"Officer Nelson speaking."
"Keep an eye out for a Skeleton Mask or any missing parts off a costume in the following: Witch, Skeleton, Astronaut and Ninja."
"Copy that."