Police on Sunday were looking for a suspect in the beating deaths of a 14-year-old Phoenix boy and his grandmother.
The suspect in the killings is the woman's son and also the boy's uncle, 35-year-old Erick Lampert, Phoenix police Detective James Holmes said.
The boy's 9-year-old sister told police that Lampert hit her brother Loggan after the two got into an argument in the grandmother's home on Saturday, Holmes said. The girl ran to her mother's nearby home because she was scared, but later called Loggan, who said everything was OK.
A couple hours later, Loggan's grandmother — 61-year-old Sheila Lampert — failed to pick up her daughter from work. Her daughter got a ride from a friend, went to her mother's home and found her dead in the bedroom with head injuries, police said.
Hours later, police found Loggan dead with similar injuries in a trash bin in the backyard.
Erick Lampert is described as a 6-foot-tall white man weighing 210 pounds with brown hair and eyes, a full beard, and a mustache.
Holmes said Lampert has a history of mental illness, does not have his medication and is considered dangerous.
Sheila Lampert is being remembered by co-workers at the Arizona Humane Society.
The Humane Society issued a news release Sunday saying they are "deeply saddened" by the unexpected loss of Sheila Lampert.
"Sheila was a valued employee of the Arizona Humane Society, always willing and happy to do what she could on behalf of the animals. We will miss her warm and caring nature, and the animals in our care have certainly lost a compassionate champion," said Guy Collison, executive director of the AHS.
Lampert worked as a veterinary technician at the Humane Society's Second Chance Animal Hospital in north Phoenix.