The Brief

PHOENIX - A Phoenix area woman is questioning why the Maricopa County Attorney's Office never prosecuted the suspect who allegedly slammed her dog into the concrete last summer.

That suspect, as it turns out, was Matthew Dierenger, the same person who, according to investigators, is accused of murdering a 67-year-old Scottsdale man.

Big picture view:

Matthew Dieringer has been described by Scottsdale Police officials as "charismatic" and "manipulative." That's a description Kim Shedd agrees with.

Shedd talked about how Dieringer approached her dog last summer, and the trauma that unfolded.

"I saw him, we locked eyes, and we fell in love," said Shedd, describing the moment she met her dog Mateo.

Mateo was rescued from a shelter, and became Shedd’s loyal companion for near

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