Beverly Hills Cop

Young and reckless Detroit police detective Axel Foley's latest unauthorized sting operation goes sour when two uniformed officers intervene, resulting in a high-speed chase through the city which causes widespread damage. His boss Inspector Douglas Todd reprimands Axel for his behavior and promises to fire him if another such incident happens again. Axel arrives at his apartment to find it has been broken into by his childhood friend, Mikey Tandino. Mikey did time in prison, but ended up working as a security guard in Beverly Hills, thanks to a mutual friend, Jenny Summers. Mikey shows Axel some German bearer bonds and Axel wonders how he got them, but chooses not to question him about it. After going out to a bar, they return to Axel's apartment, where two men knock Axel unconscious and then confront Mikey about the bearer bonds, beat him up, and kill him.
Axel asks to investigate Mikey's murder, but Inspector Todd refuses to allow it because of his close ties to Mikey. Axel uses the guise of taking vacation time to head to Beverly Hills to solve the crime. He finds Jenny working in an art gallery and learns about Mikey's ties to Victor Maitland, the gallery's owner. Posing as a flower deliveryman, Axel goes to Maitland's office and tries to question him about Mikey, but is thrown through a window by Maitland's bodyguards and arrested. At the police station, Lieutenant Andrew Bogomil assigns Sergeant John Taggart and Detective Billy Rosewood to follow Axel. After a series of encounters, including the trio's foiling of a robbery in a striptease bar, the three develop a mutual respect.
On the trail of Mikey's killers, Axel sneaks into one of Maitland's warehouses, where he finds coffee grounds, which he suspects were used to pack drugs. He also discovers that many of Maitland's crates have not gone through customs. After being arrested again, this time after a scuffle at Maitland's country club, Axel admits to Bogomil that Maitland is a smuggler, but is unsure of what exactly he is smuggling. In addition, Police Chief Hubbard, who has learned of Axel's ill-advised investigative actions, orders that Axel be escorted out of town. However, Axel convinces Rosewood to pick up Jenny instead and take her with them to Maitland's warehouse, where a shipment is due to arrive that day.
Axel and Jenny break into the warehouse and discover several bags of cocaine inside a crate. Before Axel can get this new found evidence to Rosewood, Maitland and his associates arrive. Maitland takes Jenny and leaves Axel to be killed, but after some hesitation, Rosewood enters the warehouse and rescues Axel. Taggart tracks Axel and Rosewood to Maitland's estate, where he joins the two in their efforts to rescue Jenny and bring Maitland to justice. After wiping out most of Maitland's men, Axel kills Maitland's right-hand man Zack, identifying him as Mikey's killer. With Bogomil's help, Axel executes Maitland and rescues Jenny. Bogomil fabricates a story to Hubbard that covers for all the participants without discrediting the Beverly Hills Police force. Realizing that he will be fired in Detroit, Axel asks Bogomil to speak to Inspector Todd and smooth things over for him. Later, Taggart and Rosewood meet Axel as he checks out of his hotel, and pay his bill. Axel invites them to join him for a farewell drink, and they accept.

Question: What does Axel find in one of the Maitland's warehouses?
Answer: coffee grounds