His estranged wife, Dea Millerberg, who testified against him at his preliminary hearing, is also charged in Alexis Rasmussen's death, but with lesser charges of desecration of a corpse and drug possession.
According to testimony offered during the preliminary hearing, the couple had a history of drug use and sex involving Alexis, who was 16 when she died in September 2011 from an overdose of heroin and methamphetamine allegedly administered by Eric Millerberg.
According to Dea Millerberg's testimony, the couple paid Alexis and a friend in Xanax for their babysitting services. But Alexis then began asking about meth, which the Millerbergs also used. Dea Millerberg, who was given immunity that will keep prosecutors from using her testimony against her, said her husband showed Alexis how to smoke it using a light bulb.
One the night of Alexis' death, Eric Millerberg allegedly injected Alexis with meth and heroin several times. When the couple discovered Alexis dead in their bed, they moved her body to a remote part of Morgan County, according to court testimony.
When police came looking for Alexis, the Millerbergs said she had left around midnight to meet a friend at a nearby school.
Eventually, members of Eric Millerberg's gang, Silent Aryan Warriors, broke the case for police. Eric Smith, one of the gang members who led police to the body, was also given immunity.