Sammy (Fallout 4)

Sammy is a character appearing in Fallout 4.

Background
Sammy is an Institute synth, who replaced the real Sammy and attempted to infiltrate Goodneighbor (possibly in order to retrieve a runaway synth named C2-41, last seen in Goodneighbor). However, Goodneighbor's Neighborhood Watch noticed his unusual behaviour and killed him. His body can be found on the streets of Goodneighbor.

The shooting of Sammy can actually be witnessed after randomly entering Goodneighbor where they'll shoot him. Similar to how you can witness Hancock stabbing an NPC he considered suspicious before he's a companion. The shooting event may be time sensitive to your first arrival at Goodneighbor and subsequent return.

Appearances
Sammy appears only in Fallout 4.

Behind the scenes
Sammy, based on his name and general appearance, is likely to be an Easter-Egg referencing the CW TV Series, "Supernatural" (Sam Winchester).