Gribaldi Handayani

In late 2004, Handayani became acquainted with a woman named Listi after they were introduced to one another at a seminar by a friend of hers. Introducing himself as 'Heri', the pair got intimate with one another, with him even promising Listi a job as a civil servant. In December, Handayani called her under the pretense that she had to attend training at a company in Jambi, after which Listi left her house, promising to bring back a souvenir to her family. When she failed to return home, family members notified the authorities, who subsequently located her body near the village of Bayu Lincir in South Sumatra on January 1, 2005. An autopsy at the Raden Mataher Hospital confirmed that she had been shot to death.

After two failed marriages, Handayani married a third time to a woman named Nurmata Lily, but eventually grew suspicious of her and accused her of cheating on him. As a result, he drove her to an isolated location near Pangkalan Kerinci in August 2003, where he subsequently shot her. In April 2004, he killed 34-year-old cab driver Muhammad Ali near Jambi after the pair had a disagreement over a car rental business, after which Handayani shot him four times in the head and chest.

Sometime in early 2002, Handayani was driving his car in Jambi when he accidentally ran over a man with his car. He then promised the man's widow, 28-year-old Gusmarni, that he would take of both her and her daughter financially. The pair eventually developed a deep bond, with Handayani offering to give her a job as a civil servant in Pekanbaru. Under this pretense, the pair traveled to Bagan Batu on July 5, where Gusmarni was shot seven times while urinating. The motive for this crime was apparently that she had demanded too much money from him and that she was three months pregnant.

By 2000, Handayani had begun a relationship with 27-year-old student Yeni Farida, whom eventually revealed to him that she was pregnant and wanted to marry him. Unwilling to commit to her, he lured her out to an isolated location in Kandis, Siak Regency, where he killed her and hid her body, which remains undiscovered to this day.

Handayani's first murder took place on an unspecified date in 1999, in the village of Bagan Batu, Rokan Hilir Regency. He had boarded a taxi operated by 44-year-old Rusdi Hutahuruk of Medan, who supposedly began mocking Handayani by claiming that he appeared to be of Chinese descent due to his paler skin tone and facial features. When Hutahuruk stopped by the road to relieve himself, an angered Handayani took out his service pistol and shot him four times.

His career with the Indonesian National Police began in 1985, when he was assigned to the Patrol Units in North Sumatra, before being transferred to the Intel Unit in Medan the following year. Following several transfers between precints over the next decade, he finally settled in Jambi, where he was eventually promoted to Head of the Telematics Division's Criminal Information Squad. Per standard procedure for law enforcement, he was assigned a service pistol which would be used in all of his killings.

Muhamad Gribaldi Handayani (born July 20, 1966) is an Indonesian serial killer and former police officer who killed seven acquaintances, including a lover and his third wife, in various incidents from 1999 to 2004. He was eventually convicted and sentenced to death for the crimes, but his current status is unknown.

Muhamad Gribaldi Handayani was born on July 20, 1966, in Medan. Born into a family of police officers, he spent his formative years in Dumai before returning to Medan to complete his high school and later college education in administrative law.