American man kills daughter who was also his wife after breakup

An American man killed his wife who was also his daughter and their seven-month-old son and proceeded to then take his own life after she broke up with him, The New York Times reported.

Steven Pladl's mother called police in North Carolina to say she received a disturbing call from him and to ask officers to check on the well-being of her infant grandson.

The mother told police that Steven confessed to having killed his baby along with his 20-year-old daughter and her adoptive father, who were shot in Connecticut.

Pladl's mother said he was upset because his daughter had broken up with him.

The slain infant had been born of the relationship between Steven Pladl and his daughter Katie Pladl.

"I can't even believe this is happening," said Steven's mother, whose name was redacted from the recording of the 911 call released by police.

The woman asked police to check on her grandson, Bennett Pladl.

She said Steven told her that he left a key under the front mat.

"He told me to call the police, that I shouldn't go over there," she said.

Police found the baby dead, alone in the house. Authorities have not said how the baby was killed.

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"We're trying to make sense of all the factors that led up to this senseless taking of life," Knightdale police Chief Lawrence Capps said.

The 911 call came shortly after witnesses in rural western Connecticut reported hearing what sounded like semi-automatic gunfire on Thursday morning. Inside a pickup truck with the window shot out police found the bodies of Katie Pladl and her adoptive father, 56-year-old Anthony Fusco.

Steven Pladl had contacted his daughter's adoptive family in Wingdale, New York, on Wednesday night and said he would be going to see them, said Shawn Boyne, chief of police in New Milford, Connecticut. Katie Pladl and Fusco were shot as they were out running errands.