The San Jose Mercury News reports (http://bit.ly/1aNpiWL ) the attorneys allege that plaintiff Ronndale Esporlas "freely and voluntarily exposed himself to all risks of harm" by attending the party.
The response, filed Tuesday, also says that injuries suffered by Esporlas, who was shot in the leg, were not caused by the defendants.
In the lawsuit filed earlier this month, an attorney for Esporlas claims that Smith and Walker fired weapons illegally during the party in June of last year.
Santa Clara County prosecutors say they are considering criminal charges.
Information from: San Jose (Calif.) Mercury News, http://www.mercurynews.com