Final answer:
Al Gregory is a character in 'The Big Sleep' who is investigating the disappearances in the novel. He thinks Eddie Mars is innocent due to a lack of evidence.
Step-by-step explanation:
Al Gregory is a character in the novel 'The Big Sleep' by Raymond Chandler. He is a police detective who is investigating the disappearances of Mrs. Mars and Rusty Regan. Al Gregory believes that Eddie Mars had nothing to do with their disappearances because there is no evidence linking him to the crimes.
The correct answer is that Al Gregory is a character from Raymond Chandler's novel The Big Sleep. He is one of Eddie Mars' henchmen. Gregory believes that Eddie Mars had nothing to do with the disappearance of his own wife and Rusty Regan because it is suggested that Mars would have no reason to remove his wife from the scene.
Mars is portrayed as a powerful, controlling man who would seemingly have everything to lose if his wife, who is involved in the casino business, disappeared under mysterious circumstances. This standpoint possibly stems from Gregory's loyalty or fear of Mars, or from a narrative he's been instructed to deliver to maintain Mars' innocence.