WASHINGTON -- The FBI searched the residence of the son of a Democratic state lawmaker in Tennessee over the weekend looking for evidence linking the young man to the hacking of Republican vice presidential candidate Sarah Palin's personal e-mail account, two law enforcement officials told The Associated Press on Monday.
David Kernell, 20, has not returned repeated phone calls or e-mails from the AP since last week. He is the son of state Rep. Mike Kernell. The father declined last week to discuss the possibility his son might be involved in the case.
"I had nothing to do with it, I had no knowledge or anything," Mike Kernell told the AP. "I was not a party to anything of this nature at all," he said. "I wasn't in on this — and I wouldn't know how to do anything like that."
A hacker last week broke into one of the Yahoo e-mail accounts that Palin uses, revealing as evidence a few inconsequential personal messages she has received since John McCain selected her as his running mate. The McCain campaign confirmed the break-in and called it a "shocking invasion of the governor's privacy and a violation of law."
Palin used "gov.sarah" in one of her Yahoo e-mail addresses she sometimes uses to conduct state business. The hacker targeted her separate "gov.palin" account.
After the break-in, a person claiming responsibility published a detailed chronology of the hacking on the website where the break-in was first revealed. That person identified his e-mail address as one that has been linked publicly to David Kernell.
Experts said the hacker apparently left an easy trail for investigators.
"He might as well have taken a picture of his house and uploaded it," said Ken Pfeil, an Internet security expert. "He should have just set up a big beacon that said, 'Here's my house,' or confessed. If they can't catch this guy based on all the information posted on the Web then all bets are off."
The hacker described guessing correctly that Alaska's governor had met her husband in high school, and knew Palin's date of birth and home postal code. Using those details, the hacker tricked Yahoo's service into assigning a new password, "popcorn," for Palin's e-mail account. What started as a prank was cut short because of panic over the possibility the FBI might investigate, the hacker wrote.
The FBI and Secret Service are now investigating.
The law enforcement officials confirming the search spoke on condition of anonymity because of the sensitivity of the investigation.
In Washington, Justice Department spokeswoman Laura Sweeney confirmed Monday only that the FBI conducted "investigative activity" late Saturday and early Sunday in Knoxville related to the case.
David Kernell is an economics major at the University of Tennessee there.
Associated Press Writer Erik Schelzig in Nashville, Tennessee, contributed to this report.