Six workers killed in a tragic accident at a northern Colorado dairy farm last week are being remembered as hardworking fathers and sons, the backbone of an industry that sustains families. For many in the immigrant agricultural community, the sudden loss has left them with not only grief, but questions about safety and accountability.

"It was total shock," said Ana Schultz, Regional Director for Project Protect Promotora Network . "You don't hear about six people just dropping dead in a short time. At first, people said it was an explosion, then a fire. We were all asking, 'What really happened?'"

Investigators have not yet released an official cause of death, but the coroner's early reports show they suspect toxic gases played a role.

Schultz said the tragedy has shaken confidenc

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