PHOENIX -- Under redirect questioning from her attorney, Jodi Arias tried to explain the evidence prosecutors say proves she planned to kill her ex-boyfriend.
Prosecutor Juan Martinez wants the jury to believe Arias filled gasoline containers and brought them along in her rental car from California so she would not have to stop in Arizona to fill up her tank. Avoiding a gas purchase in Arizona would prevent a paper trail of receipts.
Arias justified the extra gasoline in court Tuesday.
"I was concerned about driving in that area alone," Arias told the court. "Never having driven that road through the desert before, I wanted to make sure I didn't run out of gas."
The prosecutor believes Arias stole a .25-caliber gun from her grandfather in California and brought it with her to kill Travis Alexander at his home in Mesa five years ago.
Arias maintains she used Alexander's own gun, which he kept in his closet. She said she only meant to point it at him to prevent abuse.
The 32-year-old defendant also rattled off a list of friends and family members who would have let her borrow a gun, insisting she would never have to steal one from her grandfather.
Arias also turned her phone off during her road trip from California to Arizona, and the license plate on her rental car was flipped. While the prosecutor said Arias purposely tampered with the license plate to avoid detection, Arias blamed kids in a store parking lot.
"I noticed people skating away from the back of the car. At the time, I didn't think much of it," she said.
Arias was also asked about the steps she took to cover up the killing and avoid suspicion. Among other things, she sent a bouquet of white lilies to Alexander's grieving grandmother.
"Obviously, I felt really awful. I felt by not doing anything it'd be worse than not sending flowers," Arias explained.
"I couldn't believe that had happened. I was horrified. I was very ashamed," Arias said in possibly her most remorseful moment on the stand.
Members of the jury will get some of their questions answered by Arias Wednesday afternoon.