PHOENIX - The ex-wife of a man believed to have killed four neighbors and two dogs before turning the gun on himself is speaking out.
Michael Guzzo's ex-wife, who asked not to be identified on camera, tells ABC15 she believes he just "snapped" ahead of the brutal Saturday rampage.
She admits that she always thought something bad might happen, but she thought her ex-husband would take his own life, not hurt other people.
"You just knew it was coming. Something. I said, 'Mike, something bad's gonna happen. You can't get a handle on that,'" she said.
Guzzo was working as a registered pharmacist and moved into a townhome near 17th Avenue and Camelback Road a year and a half ago.
Police said barking from the neighbor's dogs early Saturday may have set him off on a what would become a deadly rampage.
Investigators said he shot and killed an entire family of four living next door, and fired into at least one other home before taking his own life.
Guzzo's ex-wife is a behavioral health nurse and she believes Guzzo was suffering from some form of mental illness, but said he was never diagnosed because he didn't seek treatment.
"But I think as he got older, he got sicker-- myself. From a behavioral health standpoint," she said.
She said he was full of anger and depressed.
"They were in the wrong place at the wrong time. And they had argued with the wrong person. Because I think Mike snapped," she said.
Guzzo's ex-wife said she was never afraid of him and he wasn't a violent person. She said he wasn't a bad person, he just really needed some help.
The victims have been identified as Bruce Moore, 66; his daughter, Renee Moore, 36; her husband, Michael Moore, 42, who took his wife's name; and Renee's son, Shannon Moore, 17.