SAN JOSE -- In pictures posted Tuesday on the Audrie Pott Foundation Web page, there is Larry Pott, the adoring dad through the ages, smooching his toddler's cheek, smiling as he crouches down to her level a few years later, and wrapping his arm around her shoulders when she grew into a teenager and dressed up in a pretty blue dress.

"From her first breath to her last and everything in between. What a great Daddy!" Pott's wife, Lisa, wrote in a note accompanying the photo collage.

A far different picture is painted in new court papers that called Pott's fatherhood into question in a case that made national headlines and shined a harsh light on teenagers, alcohol and cyberbullying. Larry Pott is not Audrie's biological father, claims a lawyer for one of the teenage boys accused of being responsible for the 15-year-old girl's suicide.

The court filing also claims Larry Pott and Audrie's mother, Sheila Pott, are at least partially to blame for the tragedy.

Larry and Sheila Pott, who are long-divorced, either knew or should have known of Audrie's "long-standing and serious emotional problems before her suicide and they should have sought professional help," according to the court papers filed by lawyer Philip Pereira in response to the Potts' wrongful death lawsuit.

Neither the Potts nor their lawyer would comment on the new claims Tuesday. But in a message posted under the collage of photos on the foundation's Facebook page, one woman commented: "The constant re-victimization of your family is unacceptable. So sorry for your continual loss."

The claims against the Potts forecast a nasty court showdown, and legal analyst Peter Keane, dean emeritus and law professor at Golden Gate Law School, said the legal tactic is "going to backfire" against the boys.

"It sounds to me that much of what's being raised is a lot of irrelevant smoke screen to attempt to get away from the main issue of whether or not the people being sued are responsible in any way for the loss of this child," Keane said Tuesday.

Audrie hung herself in her mother's home in September 2012, a week after she drank too much and woke up from a party at a girlfriend's house, partially naked with dirty messages scrawled on intimate parts of her body. She had been sexually assaulted, according to court papers. At least one photo was taken and shown around campus, the Pott family has said, which traumatized and humiliated Audrie and led to her suicide.

Three boys, all from Saratoga High School and friends or acquaintances of Audrie, were charged in juvenile court.

In the aftermath, Larry Pott and his wife, along with Audrie's mother, Sheila, held news conferences, formed a foundation in Audrie's name and spearheaded legislation to increase the penalties against teenagers involved in cyberbullying. It also spurred new conversations between parents and teenagers across the country about bad behavior, the power of social media and tragic consequences.

The Potts also filed a wrongful-death lawsuit against the boys' families and in June added a fourth teenager: a girl who the Potts say was in the room and encouraged the boys to draw on Audrie and take pictures.

Pereira filed a five-page response to the claims on behalf of one of the boys on Dec. 27. Not only was Pott's suicide "set in motion by the plaintiffs years before the events," the response said, but also after an altercation between Audrie and two of her friends who are not named as defendants. Previous court records indicate that one of Audrie's friends ended their friendship after chastising her for a recent change in her personality and drinking too much.

Pereira also singled out Sheila Pott, but provided little context or explanation for his claims. He quoted former Superior Court Judge Dolores Carr in a 2005 court matter: "Ms. Pott, I would be remiss if I didn't look you in the eye and tell you what a mess I think you've made for many people ... because in this court's view, having ballet lessons and piano lessons and private school is really nothing in terms of the kinds of consequences your behavior has brought on your daughter."

When reached at home Monday, Pereira declined to comment.

Court documents obtained by this newspaper show that Larry Pott's paternity was contested in 2003 by a man who claimed he and Sheila Pott had an affair while the couple was separated. The case was dismissed, however. The Potts had reconciled before Audrie was born, and Larry Pott is listed as the father on Audrie's birth certificate.

Keane, the legal analyst, said the paternity claim does not diminish Larry Pott's right to file a wrongful-death suit as her father.

To contest paternity, the man needed to file his case within two years of the birth of the child, he said. In Audrie's case, the man filed a claim when she was 6.

"It doesn't matter whether biologically it was his child, even if you can provide by DNA that it is," Keane said. "Under California law, a child with parents who were cohabitating at the time, if the father holds himself out to be the father, he is by law that child's father."

Robert Salonga contributed to this report. Contact Julia Prodis Sulek at 408-278-3409. Follow her at twitter.com/juliasulek