Italian prosecutors on Wednesday asked a judge to issue prison sentences for three Google executives and one former executive accused of defamation and failure to comply with privacy laws in a case that could alter the way Google operates in Italy and the rest of Europe.

The prosecutors contend that Google was negligent because it allowed a video of high school kids bullying a disabled classmate to stay on its Italian-language video service for two months in 2006. The company, based in California, says it removed the video several hours after being alerted of its existence.

The prosecutors submitted a 119-page document with evidence they say shows Google must have known about the video long before it was taken down.

The prosecutors rested their case after asking for a one-year sentence for three executives — David Drummond, senior vice president and chief legal officer; Peter Fleischer, global privacy counsel; and George Reyes, a former chief financial officer. They are seeking a six-month sentence for Arvind Desikan, who is now head of consumer marketing in Britain.