Plot Outline contains spoilers but proposed change is rejected

Current outline for upcoming film A MORTE NOS TEUS OLLOS (tt35715640) contains major spoilers:

Revolves around two Vigo police officers who killed a businessman, his wife, eldest daughter and housekeeper near Oliveira's home in Nigrán for 20 million pesetas ($160,000).

I've tried to change it twice but it's been rejected (tracking number 260224-214711-272000). After checking tips on plot outline I can't figure out what's going on. My proposed alternative is this one:

In 1994 Vigo, two disgraced police officers team up to rob a local businessman. One is a suspended father on the brink, the other a volatile high-stakes gambler. As their scheme unfolds, their fragile alliance begins to crack.

I would appreciate help with this one.

Many thanks,

Guillermo de Oliveira