Paper Trail, Tasers in Yacht Murder Case

"I really didn't know it was going to be fraudulent," Harris said of the documents she notarized. Though her normal fee was between $50 and $250, the prosecution says she received $2000.

"I did not know how much he paid me until I got in the car," Harris said. But she also said that Jennifer Deleon promised her more money "when this is all over."

Harris said she didn't feel right about the transaction, so she called Rohrig to inquire further about the Deleons. She said Rohrig told her during a phone conversation several days later that she'd need to take care of more documents, or that Skylar Deleon, who he said had ties to the Mexican drug cartels, would come after her family.

"I was going to do whatever I needed for me and my family not to be killed," she said.

Rohrig, she said, then gave her physical descriptions of the Hawkses and "he told me to tell the detectives that I met Tom and Jackie by the yacht to sign the documents."

Harris admitted she repeatedly lied to investigators in interviews, saying she wanted to tell the truth, "but I was scared for my life. I was told he [Deleon] had killed over 20 people."

"I was always watching my back, I always felt like someone was after me," she added.

Harris received immunity from the prosecution in exchange for her cooperation.

Jurors also heard from employees of the Arizona bank where the Hawkses held an account, who said they encountered Skylar Deleon as he allegedly attempted to transfer the Hawkses' money to an account in Mexico.

Luann Kenney, one of the bank employees, testified that Deleon claimed to have power of attorney for the Hawkses, but that he became evasive when she asked to speak to the couple to discuss the money transfer.

The court also heard testimony about the death of John Jarvi, the other victim Deleon is alleged to have killed. Deleon and Jarvi met in a work furlough program while the former child actor was serving time on a burglary charge.

Michael Lewis, Deleon's cousin, took the stand Wednesday.

"We have nothing but sympathy for the Jarvi family," Ryan Hawks told ABC News. "We felt there's more truth to be told in Michael Lewis' testimony."

On the stand, Lewis said he and Deleon "were like brothers," but that after the December 2003 murder, his cousin turned on him, threatening him to fall in line with the Deleons' story about a trip to Mexico during which prosecutors believe Skylar Deleon killed Jarvi.