After the civil war ended, both General Imbert and his rival Colonel Francisco Caamaño resigned, and Héctor García-Godoy, a civilian, was sworn as interim president.

[3] He was removed from the post by then president Rafael Trujillo for sending him a telegram informing upon the names of the survivors of the failed Luperón invasion [de].

[7] Imbert, the driver of the ambushing vehicle, was accompanied by Antonio de la Maza, Salvador Estrella Sadhalá and Amado García Guerrero - the active participants who carried out the plot.

Most of those involved in the assassination plot were subsequently captured and executed, with the exception of Imbert and Luis Amiama Tió.

Imbert's faction, called the Government of National Reconstruction was endorsed by the U.S. troops inspectors, in addition, he was one of the collaborators with the Americans, finally signing a peace act that put an end to the April war.

[citation needed] On March 21, 1967, he was shot in Santo Domingo while traveling with Marino García,[8]: 256  in an attempted assassination made by the late dictator Trujillo's supporters.