Sabin Genestra

From Memory Alpha, the free Star Trek reference.

Sabin Genestra was the Betazoid aide to Starfleet Admiral Norah Satie in 2367. He accompanied her on her investigation of an explosion in the USS Enterprise-D engine room, despite Captain Jean-Luc Picard's misgivings about employing a telepath in a criminal investigation. Genestra sensed deception in Crewman Simon Tarses, which Satie believed implicated his involvement in the explosion. Tarses in fact was hiding the fact that he was one-quarter Romulan, and had lied to gain entry into Starfleet. (TNG: "The Drumhead")

Sabin Genestra was played by Bruce French.