Generate a question that has the following answer: Lou Janero for the following movie plot: For San Francisco veteran police detective 'Dirty' Harry Callahan (Clint Eastwood), fame catches up with him when he testifies against crime kingpin Lou Janero (Anthony Charnota) which puts Janero into prison. One night, Callahan is attacked by Janero's men at a turnoff near the San Francisco Oakland Bay Bridge while driving his car. However, he knocks down one of the assasins with his car and shoots the remaining men dead before they finish their jobs. Afterwards, Dirty Harry Callahan and his new Asian-American, martial arts-skilled partner Al Quan (Evan C. Kim) are assigned to investigate the death of rock singer Johnny Squares (Jim Carrey).After slasher film director Peter Swan's (Liam Neeson) producer is killed in a Chinatown restaurant robbery which Callahan foils, Callahan discovers that he, together with Johnny Squares are part of a game in which participants try to predict the most celebrity deaths, presumably from natural causes or from those that work in dangerous professions, and in a turn of events, two more celebrities on the list are killed.Along the way Harry has to deal with the media, particularly reporter Samantha Walker (Patricia Clarkson), to balance their interference with the investigation against the public's right to know. She also proposes to do an in-depth profile on Callahan for her news report, while he wants to simply perform his job and stay out of the limelight. After one dinner meeting, they narrowly escape being killed by Janero's men in an elevator outside a restaurant, leading the reporter to reconsider the plight of police officers.The following morning, Callahan drives to the prison where Janero is serving his sentence to meet with a chain smoking inmate named Butcher Hicks (who is very large and muscular). Callahan promises Hicks a carton of Camel Un-Filtered cigarettes if he helps Callahan out. When Callahan reaches Janero's cell, he makes it clear to Janero that if something happens to him, then Butcher will pay him a visit and probably kill him (this results in Janero...
The answer to this question is:
Who does Dirty Harry testify against?