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Two brothers went to an anime convention last weekend after the older sibling shot and killed their parents inside their San Jose home, newly released court documents alleged.

Prosecutors on Friday charged Hasib bin Golamrabbi, 22, and Omar Golamrabbi, 17, with two counts each of murder, the Santa Clara County district attorney’s office said. Omar Golamrabbi was being charged as an adult, prosecutors said.

The older brother admitted to shooting his father multiple times inside their garage “because a stranger whom he could not name had assaulted him in the home [and] had told him to do that,” according to a court document released by the district attorney’s office. He said another person had shot his mother multiple times.

The younger sibling told investigators that he had been inside their home when his older brother killed his parents but didn’t mention the presence of another person, according to the court document.

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