Acosta went to the police, and the police came back with the news he feared: his mother was dead.
"She used to smile," said Acosta. "Even knowing you were down, even knowing you would cry, she would come with her loud mouth. She would dance and just make you laugh."
Acosta spoke just hours after deputies unearthed his mother's body from underneath her own backyard patio.
She was under four inches of dirt, plywood and a washing machine.
Deputies say her boyfriend, Alejandro Flores-Sanchez, led them to the spot after killing and burying her after a disagreement on Tuesday.
"It kills me. It happened too fast, it happened too quick. She was a great person. She didn't deserve this," Acosta said.
Acosta says the day his mom died, Angela told him she was leaving Flores-Sanchez. He had gotten too violent with her, and it wasn't the first time.
"I was his best friend before. I knew this guy," said Acosta. "He used to hit her, anytime. He was just an abusive guy with women."
Friends say that Flores-Sanchez had been acting weird the last few days. Neighbors say he told them something bad happened to Angela, but wouldn't say what.
Neighbor Renato Burgoa says Flores-Sanchez tried to sell him some of his livestock, saying he was leaving town and needed money.
"I was like hey, did you do something bad? He was like, 'you are stupid,'" said Burgoa. "I want him in jail."
Burgoa got suspicious and took him to deputies himself.
Hours later, Acosta's worst fears were confirmed. His mother was gone, before she could get out.
"I just want justice," said Acosta. "I'm going crazy and this is not fair."
Deputies say they have a full confession from Flores-Sanchez, who is charged with second degree murder.
Angela was a teacher at a local daycare and leaves behind four children.
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