Deep Throat

First Line: "Leave this case alone, Agent Mulder."
Last words: "Trust no one." (To Scully)
Death: 1994; Shot while trading a stolen tissue sample inexchange for Mulder's life
History: Worked with William Bill Mulder, Well-Manicured Man, CSM and Mr. X; Assassinated an E.B.E. on Christmas Eve 1991 in accordance with Resolution 1015
Earliest known employment: 1972
Informant: Gives Agent Mulder confidental, valuable information concerning his cases.