On May 25, 1982 Jamar met with FBI agents Fitzpatrick, Montanari, Robert McEleney, SAC Ed Enright, Randy Prillaman, McWeeney, Joe Rush, and supervisors Ronald Reese and Anthony Amoroso, to discuss the Halloran/Wheeler murder. Jamar was involved because two FBI informants were being investigated on charges that they had been complicit in the murder. This perceived "bungling" was later mentioned in a civil suit alleging mass mismanagement of the Informant system.
On November 20, 1990 he and Minneapolis police chief declined to comment on the size of the ransom being demanded in the abduction of a local bank chairman.
In 1993, he referred to the San Antonio prison gangEl Eme as the "most dominant" gang within the Texas judicial system.