[ElmoMobito]

It was a $118,000 bonus. How did the killer know about that, to write it in the ransom note?

[NinoFan]

Basic eavesdropping equipment isn't that expensive anymore.

[Toskrin]

It was a $118,000 bonus. How did the killer know about that, to write it in the ransom note?

Easy. Check stub or entry in his checkbook, sitting around the house.