PHOENIX (AP) — Michael Guzzo was becoming increasingly unhinged.
For months, he complained about incessant dog barking coming from homes all around him. He even put up fliers on doors throughout his Phoenix townhome complex advising people of pet ordinances and fines.
This weekend, police say, the 56-year-old went on a rampage, methodically killing four members of a family who lived next door, along with their two dogs. He then walked across a courtyard and tried to kill more neighbors with dogs before he returned home and killed himself.
One of the victims, Renee Moore, "told me all the time the man was crazy," said her mother-in-law, Jacque Alderman, 70. "He just couldn't stand the dogs."
Also killed in the Saturday shooting were Moore's father, Bruce Moore, 66; her husband, Michael Moore, 42, who used his wife's last name; and her son, Shannon Moore, 17.
While Guzzo's motive died with him, neighbors and family members of the victims pointed to his growing annoyance with noise from neighborhood dogs.
"He hated them. But everyone here has dogs," said Joni Flood, 27, who lives a few doors down from the victims.
Libni Deleon, 26, said he returned home from work just a few months ago to find Guzzo standing by his back gate, where Deleon's two dogs were on the patio barking.
"He said, 'Your dogs are barking. I'm here to live in peace,'" Deleon recalled.
Moments after Saturday's killings, Guzzo went back to Deleon's home and began kicking on the front door.
Deleon's wife, Vanessa, had just gotten out of the shower. She grabbed their two children and ran upstairs to hide in the bathtub.
Libni Deleon went toward the door as Guzzo blasted two holes through it, sending about 20 shotgun pellets into the walls at the back of their home.
He ran upstairs to get his gun, opened the window and began to yell at Guzzo, who opened fire again before walking back to his own home to kill himself.