The mother Z.Z., her daughter Lj.K., and son Ž.Z. jointly decided to end their lives, with the son taking the lives of the mother and sister before taking his own.The family took this desperate step because they couldn’t cope with the grief and pain following the tragedy that struck them in May when Lj.K.'s 34-year-old daughter passed away from leukemia.A source close to the investigation reveals that besides purchasing coffins, the family made all the preparations for their own funerals and left behind seven letters.In one letter, they explained the reasons for this desperate act, while the other letters were intended for people close to them and contained various instructions.The letters detailed who would bury them and where… Along with the letters, they left bank cards and wrote down PIN codes to access money for funeral expenses - a source close to the investigation discloses.He says that in one envelope, they left 200 KM and in the letter mentioned that it was money intended for buying flowers needed to be placed on the grave of the deceased 34-year-old, on a specific date. One of the letters was addressed to her boyfriend.They described in detail what they would do to themselves and how… They even wrote that just before the tragic act, they would have a shot of brandy, and during the investigation, a bottle of brandy and three glasses were found on the table. They showered beforehand, changed into clean clothes… Then they lay down in bed and ended their lives as they had stated - a source from the investigation explains.This tragic case shocked all investigators, as even the most experienced among them had not seen anything similar in their careers. The details the family paid attention to before the tragic act also surprised them.They locked the front door from the inside, and the key was pulled halfway out of the lock so that it could be unlocked from the outside. They thought of that since they left the spare key outside the entrance door - reveals a source from the investigation.A neighbor of this family, M.V., told ATV that nothing hinted at the tragedy.The police asked around the neighborhood if any of us had seen or heard anything. They were interested in whether this family had confided in anyone and if they had told neighbors anything about what they planned to do - said M.V., mentioning that he helped in carrying the bodies found on the bed in the house