The Obama administration signed a law-enforcement agreement with Cuba Monday that doesn’t call for the return of U.S. fugitives, including former Black Panther Joanne Chesimard, who is wanted for killing a New Jersey police officer. The pact was signed by Jeffrey DeLaurentis, the de facto U.S. ambassador in Havana, and the Cuban Interior minister Julio César Gandarilla. It covers a broad range of law-enforcement topics, such as counternarcotics operations. Also present at the signing was White House deputy national security adviser Ben Rhodes, who played a key role in forging Mr. Obama’s policy of restoring diplomatic ties with Cuba in...