Walter Pierceedit

From Memory Alpha, the free Star Trek reference

Walter Pierce in Troi's hallucination Walter Pierce in Troi's hallucination
Gender:	Male
Species:	Human/Betazoid Hybrid
Affiliation:	Federation Starfleet
Rank:	Lieutenant junior grade
Occupation:	Specialist
Serial number:	HG-021-996
Status:	Deceased
Died:	2362
Father:	Ambrose Pierce
Mother:	Anita Pierce
Played by:	Mark Rolston
His personnel file. His personnel file.

Lieutenant junior grade Walter J. Pierce was a Starfleet engineer, a specialist in linear warp containment systems. Born on Epsilon Indi II, he was the son of Anita and Ambrose Pierce. He went to Starfleet Academy in San Francisco. He had been the recipient of numerous decorations, including the Okuda Award in subspace research, the Jalhal Award for warp field engineering, and the Extended Tour Ribbon (with cluster). His service record included tours on the USS Chicago and the USS Suleiman before he began work at Utopia Planitia constructing the USS Enterprise-D. He served as assistant team leader installing engineering power conduits, and the warp engine local control systems.

In 2362, he murdered his girlfriend Marla Finn and her lover in a jealous rage and then killed himself by jumping into the plasma stream of the Enterprise-D.

Walter was part Betazoid, and this left empathic traces in the nacelle tube bulkhead. These traces affected others and one crew member, Daniel Kwan, killed himself. While investigating his death, Deanna Troi was also affected, but saved at the last moment by Lieutenant Worf.

Troi perceived numerous details about Pierce's life through his illusory personnel file when she detected his empathic memory traces. (TNG: "Eye of the Beholder")