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Harris County officials said at a news conference Monday that the urns went missing over a weekend in early November.
A Houston ordinance requires scrap metal dealers to collect a name and address from each customer's government-issued ID, allowing detectives to issue charges against seven people who sold the urns.
Each of the seven will face a charge of second-degree felony theft, which can be punished by up to 20 years in prison.
Authorities say the urns are valued at a total of about $120,000, but that the thieves likely received less than $4,000 from the scrapyards.