A "manipulative" and "charismatic" homeless man in Arizona known for "befriending others" has been arrested for allegedly killing a 67-year-old man inside his Scottsdale townhome, cops say.

Matthew Dieringer, 35, is accused of killing Frank Quaranta — who lived at a residence near 68th Street and McDowell Road — in what cops are calling a "targeted attack" that was uncovered Monday afternoon during a welfare check after Quaranta failed to show up for work, according to the Scottsdale Police Department .

Dieringer is a Colorado native who was convicted in 2020 of beating and dismembering his roommate's two dogs. He received credit for 705 days served after being given an 18 month prison sentence before relocating to Arizona, according to court records.

"He has a history of experiencing h

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