Berwyn Heights, Maryland mayor's residence drug raid

During the interrogation, Calvo repeatedly requested to see the search warrant, but his lawyer stated no copy was provided until three days later. A County Police spokesman initially stated that a no-knock warrant had been issued for Calvo's home. However, after Calvo's lawyer challenged that statement and media published copies of the warrant, the commander of the county's narcotics enforcement division stated that no-knock warrants do not exist in the county.[15] However, no-knock warrants were clarified in a 2005 law, sponsored by Baltimore Delegate Curt Anderson,[16] that limits their use to suspects fleeing into a house, or if a suspect is considered armed or is attempting to destroy evidence.[17]

During interrogation, Calvo stated that officers did not believe he was the Mayor and for a time refused his request that they contact the Berwyn Heights Police Department (which was unaware of the raid) to confirm his identity.[18] Police Chief High stated his department did not know the home was owned by the mayor and his wife.[12]

Patrick Murphy, chief of police for the Berwyn Heights Police Department, was especially critical of the county police.[8] Murphy argued that the raid could have been prevented if his department had handled the situation, stating "you can't tell me the chief of police of a municipality wouldn't have been able to knock on the door of the mayor of that municipality, gain his confidence and enter the residence". Furthermore, according to Mayor Calvo, a memorandum of understanding between the county and the city requires county police to inform the city if an operation is being conducted within their jurisdiction.[19]

In an editorial a week after the shooting, The Washington Post criticized the actions of police officers as "a Keystone Cops operation from start to finish", alluding to the lack of proper execution by the sheriff's office's SWAT team.[3] Additionally, groups such as the Cato Institute were critical of the operation and used it as an example of the dangers of the War on Drugs and the militarization of local police departments in the United States.[19][20] Marc Fisher of the Post also related this incident to the growing prevalence of SWAT units, even in small jurisdictions, noting a massive increase in the amount of SWAT deployments since the mid-1980s.[17]

Further criticism was leveled against the sheriff's office's deputies for the shooting of Calvo's two dogs. Contrary to the official internal investigations conducted by the sheriff's office and the county, Calvo stated his dogs were not a threat to the deputies. To support his claims, Calvo paid for a necropsy to be conducted on each dog by the Maryland Department of Agriculture. According to the results, one dog was shot four times, including twice in the head and chest. The other dog was shot twice, including once in the back of the leg which bolsters Calvo's argument that the dog was fleeing and that the force used was "unbelievably excessive".[13] This version of events was also confirmed by the later testimony of a law enforcement officer present at the raid.[21]

Prince George's County Police later arrested two men in a drug trafficking plan involving the shipment of large parcels of marijuana to addresses of uninvolved residents. After each parcel was delivered outside the addressee's home, another individual would retrieve the drugs. Police seized six packages containing 417 pounds (189 kg) of marijuana.[9]

On June 19, 2009, the Prince George's County Sheriff's Office issued a report of an internal investigation that cleared its deputies of any wrongdoing in the Berwyn Heights raid. Prince George's County Sheriff Michael Jackson said during a press conference that the findings of the report "are consistent with what I've felt all along: My deputies did their job to the fullest extent of their abilities....In the sense that we kept these drugs from reaching our streets, this operation was a success."[22] Jackson's explanation did not address the fact that the package was intercepted in the FedEx warehouse and delivered under police supervision.

During the press conference, Jackson gave the first apology for the raid by a county official. "I am sorry for the impact this has had on Mayor Calvo, Ms. Tomsic and Ms. Porter and for the loss of their family pets," Jackson said. "It is extremely unfortunate that a felonious drug trafficker involved this family in his criminal enterprise."[23]

In response to the report, Cheye Calvo issued the following statement: "By commending his deputies for their actions, the Sheriff is placing other innocent families and innocent family pets at risk. There is no excuse for the no-knock entry into our home, the killing of Payton and Chase, and the prolonged handcuffing of my mother-in-law and myself."[24]

A lawsuit was filed in June 2009 against Prince George's County Sheriff Michael Jackson; Detective Shawn Scarlata; the state of Maryland; Prince George's County; and two "John Doe" deputy sheriffs, whose names were not immediately released.[25] In depositions, law enforcement personnel admitted that at least one of the dogs was running away when shot.[21] In January 2011, the suit was settled out of court for an undisclosed amount of money and various SWAT reforms.[26]

In 2009, Mayor Cheye Calvo proposed a measure that would require every Maryland police department that operates a SWAT team to submit biannual reports on its activities, including where and when it was deployed and whether an operation resulted in arrests, evidence seizures, or injuries.[27] The bill passed that same year, despite strong opposition from Maryland's police agencies. Maryland was the first state to adopt such legislation; Utah became the second when it passed a similar bill in March 2014.