Erik Michelsen Jr. was released Wednesday evening from Norman Regional Health System, a hospital spokeswoman said. Josh and Heather Sharber and Colton Simmons were released earlier this week.
Many of the partygoers were friends and had either attended high school or college together at East Central University.
Cody Weddle, 20, of Ada, was arraigned Monday in Pontotoc County District Court on complaints of murder and conspiracy to distribute a synthetic substance. He has not been charged and has been denied bail.
Court records state Weddle, Jewell and Akerman diluted the drug with water at Jewell's home on Friday. Weddle returned to his residence, and Jewell and Akerman took some of the drug to the party to sell, court records show. Weddle told investigators the solution was supposed to be further diluted before it was sold.
Officials in Pontotoc County said Akerman was a successful drug court graduate.
Jewell was arrested in March 2009 and charged with maintaining and keeping a residence where drugs are kept, and possession of a controlled substance near a school.
There were 13 people in the home the night police served a search warrant and found 10 ounces of marijuana there, court records state. The charges against Jewell were later dismissed.
“My daughter is the last person I thought this would happen to,” Jewell's mother Lida Beckman told The Oklahoman. “She was a good daughter.”
Another death being investigated
Officers with the Roff Police Department continue to investigate the unexplained death of Jeffery Walls, 29. Walls, a construction worker, was found dead Saturday — the same day people at the party were sickened by 2C-E.
Assistant Chief Tom Cox said it's still not known if there is a connection between Walls' death and the party in Konawa.
Police received a call Saturday to a residence in Roff and were told of a possible death. It wasn't Walls' home.
Walls' obituary states he was born in Ada.
Roff is about 30 miles south of Konawa and about 30 miles east of Pauls Valley.
Walls had a criminal record and was charged in April with possession of a controlled dangerous substance and driving under the influence of drugs.
Pontotoc County District Attorney Chris Ross said Walls was not at the party where Jewell died Saturday.