An Aurora couple has been found guilty by a federal jury in Denver of growing marijuana in a massive black market operation.

Huanyu Yan, 54, and wife, You Lan Xiang, 50, were found guilty after a four-day trial before U.S. District Judge Raymond P. Moore, the U.S. attorney’s office in Colorado announced Friday.

Both defendants were remanded into custody pending sentencing, which is scheduled for Feb. 24, the release said.

On Oct. 18, 2018, the Drug Enforcement Administration, North Metro Drug Task Force and Aurora police executed a federal search warrant at 20050 E. Doane Drive in Aurora, according to the release. Investigators found a large-scale illicit marijuana grow in the basement, with 878 marijuana plants. Also in the basement was almost 10 pounds of processed marijuana.

The defendants were convicted of conspiracy to manufacture and possess with intent to distribute 100 or more marijuana plants, possessing with intent to distribute 100 or more marijuana plants, and using and maintaining a drug-involved premises. They face mandatory minimum five-year prison sentences.

“This is an important verdict for the people of Colorado, who’ve been overrun by black market marijuana,” said U.S. Attorney Jason Dunn, in the release. “This verdict sends a strong signal to anyone growing black market marijuana in Colorado that they can’t hide.”