This doesn't sound suspicious...

A federal Customs agent was being grilled by Queens cops Thursday night about how a friend ended up dead on his kitchen floor with a bullet in his chest from the agent's gun, police sources said.

Federal agent grilled in pal's death

Eric Alke, who works for Immigration and Customs Enforcement, told police that Adrian Moldovan, 50, picked up the weapon from the kitchen table in Alke's Forest Hills home and shot himself after they had been out drinking, sources said.

Before the shooting, Alke and Moldovan, a real estate agent, pounded down bottles of Budweiser and shots of Jagermeister for three hours at nearby Morrison's Irish Pub, a source said. Police were combing surveillance video from the tavern to examine the men's behavior.

After several hours of questioning, Alke retained a lawyer and clammed up, sources said.

The shooting took place about 3:30 p.m. and somehow Moldovan's bloody body ended up in the driveway with Alke's landlord giving him CPR, a witness said.