The Supreme Court appears to be concerned about letting the police track individuals through their cell phones without a warrant. This comes after a landmark case in Carpenter v. United States (2018) suggested that police must obtain a warrant before obtaining cell phone data revealing where a person has been in the past. The justices questioned Adam Unikowsky, the lawyer for a criminal defendant who was convicted of robbing a bank, and expressed skepticism about his claims that the Constitution places strict limits on the government's ability to track people through their phones. Chief Justice John Roberts suggested that if the government had too much power to track individuals, it could potentially learn the identity of everyone who attended a particular religious service or attended a political meeting. The Court may rule that the warrant in Chatrie complied with the Constitution.