A Wyoming federal grand jury handed down indictments Thursday to a dozen defendants for conspiracy to distribute heroin which resulted in death, according to court records.

If convicted, the defendants face at least 20 years behind bars, according to the indictment.

The indictment stated they conspired from July 2010 to July 2014 to possess with the intent to distribute more than 1 kilogram, or 2.2 pounds, of a substance containing heroin that caused a death.

Joseph W. Phillips died as a result of their conspiracy on Jan. 28, 2014, according to the indictment.

The indictment does not state the residences of the defendants or the deceased.

Federal prosecutors have filed a motion with the court asking all defendants be detained because they are charged with drug offenses with penalties of 10 years or more, they pose a significant flight risk, and to safeguard other persons and the community.

The first filing occurred on July 1, when a warrant was issued for lead defendant Wayne Bailey. On July 18, U.S. Magistrate Judge Kelly Rankin ordered Bailey held without bond because he would be a risk to others and he has been a daily heroin user for four years and a weekly cocaine user for two years.

Another defendant, Isaac "Trey" Johnson, was arrested in Utah earlier this month and the case was transferred to Wyoming.

Friday, U.S. Magistrate Judge Michael Shickich said during a detention hearing in Casper that Johnson did not have a significant criminal history. However, Shickich said the quantity of the drug persuaded him in part to order Johnson to be held without bond

Warrants have been issued for the arrest of the other defendants: Kara Harper, Jessica Fife, Skyeler I. French, Andrew J. Ebert, Ryon Rudy James Herbst, Erik M. Styles, Cameron Morris, Heather L Fletcher, Erica J. Ganino and Darren Olsen.