12 3-4

var room = "dining room";
var suspect = "Mr. Parkes";

var weapon = "";
var solved = false;

if (room === "ballroom") {
    weapon = "poison"; solved = suspect === "Mr. Kalehoff";
} else if (room === "gallery") {
    weapon = "trophy"; solved = suspect === "Ms. Van Cleve";
} else if (room === "billiards room") {
    weapon = "pool stick"; solved = suspect === "Mrs. Sparr";
} else {
    weapon = "knife"; solved = suspect === "Mr. Parkes";
}

if (solved) {
    console.log(`${suspect} did it in the ${room} with the ${weapon}!`);
}