While the Will County hearing is about the death of Savio, Thursday's testimony focused on the day Stacy Peterson disappeared. Prosecutors would not say why Morphey was being asked to testify about Stacy Peterson, but Will County state's attorney's office spokesman Chuck Pelkie said the reasons would become clear in the proceedings.
In a packed but quiet courtroom, Morphey said Peterson suggested when they talked on Oct. 27, 2007, that he intended to kill Stacy because she planned to divorce him, win custody of their children and take Peterson's money.
Morphey said he drank heavily the next day.
"I just heard someone was going to murder somebody else," Morphey explained.
Peterson brought Morphey back to his Bolingbrook home, went into a master bedroom and rolled out a large blue barrel that Morphey estimated weighed up to 150 pounds.
"He had me grab an end, he grabbed the other end and we proceeded down the stairs," Morphey testified. "It felt warm."
Morphey stopped short of saying that Peterson directly admitted murdering Stacy and he said the two men never talked about what was in the barrel.
Earlier in the day, Morphey said he told Peterson at one point that he always assumed he had killed Savio, but that Peterson had denied it.
Savio's body was found in an empty bathtub in her home in 2004. Her death had initially been ruled an accidental drowning -- until Stacy Peterson's disappearance led officials to exhume Savio's body, conduct another autopsy and conclude Savio was the victim of a homicide.
The story of the blue barrel has been central in Stacy Peterson's case. Numerous search parties over the years, including divers, have focused on finding it, but it has never turned up.
In court, Morphey said he had not wanted to go with Peterson, in part because he didn't want anything to do with what Peterson did. Morphey did not explain why he agreed to help him.
According to his testimony, the two men took the barrel, put it in Peterson's SUV and Peterson drove Morphey home.
"'He said, 'This never happened,"' Morphey testified. "I said, 'I won't tell a soul."'
Nevertheless, Morphey said he later told his girlfriend, brother and a neighbor. He said he was stressed out, nervous and drinking more than normal.
He said the fear led him to overdose on Xanax tablets in an attempt to end his life.
"I felt everything was coming down on me," he said. "I'm still scared to death."
Peterson's attorneys have raised questions about using Morphey as a witness. He suffers from a bipolar disorder and has admitted to drinking too much. Morphey has acknowledged both issues and on Thursday prosecutors presented evidence that verified what Morphey said happened. That included video footage and witness interviews showing that both men made a trip to Starbucks around the time of the blue barrel incident.