"She was so excited to have her boys that it was palpable," Pratt said.
Wiltscheck saw that same excitement. She was a good mom, he said. And for her boys, "she was number one."
The neighborhood was shut down during the incident and close-by neighbors were evacuated.
At a news conference, Arradondo said the neighborhood had "faced a very sad and tragic day."
He thanked the neighbors who initially tried to help, along with the first officers who responded and the SWAT team.
"This is certainly not a conclusion that I as a chief would have wanted," he said.
Such incidents always "shock the conscience," he said. "The question is, do you ever get used to these? No, you do not."
Wiltscheck said he'll miss throwing balls over that tall fence to the two boys he was watching grow up. Every time they saw him, they'd wave hello, he said.
"If I had the chance, I would have traded my life for those kids," he said. "I just can't make sense of this."
(Staff writers Paul Walsh and Libor Jany contributed to this report.)
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