On the evening of February 20, 2016, at about 9:15 p.m., William Andrew Mishler, 42, and his younger brother Robert Alan Mishler were shot and killed in an apartment building just west of downtown Helena, Montana. William, known as Billy, was remembered by family for a generous, trusting nature, an infectious laugh, and a love of the mountain states; he had served in the Army and worked on large machinery, including as a mechanic and roofing foreman, and was most recently employed at a home building supply store.

Police located a suspect, 43-year-old resident Tilmon R. Nungesser IV, in the basement of the same apartment building and arrested him on suspicion of deliberate homicide. The Lewis and Clark County Coroner’s Office confirmed the identities of the two victims. The motive for the shooting was not immediately clear.

If anyone knew William or Robert, lived in that building, or has information about what happened that night, please come forward with tips.