Gandzyuk's death has sparked condemnation of the government and drew renewed attention to dozens of assaults on other anti-corruption campaigners in Ukraine over recent months.
Ukrainian prosecutors said Monday they had charged a high-ranking regional official with organizing a deadly acid attack on a prominent anti-corruption activist that prompted widespread outrage.
Kateryna Gandzyuk was attacked in July and had about a liter of acid poured on her by several attackers. The 33-year-old died in November after months of treatment, including more than 10 operations.
Her murder has prompted widespread outrage, with civil society activists accusing the authorities of failing to complete the investigation or find out who ordered the attack.
On Monday, less than two months before Ukrainians go to the polls to elect a president, General Prosecutor Yuriy Lutsenko pointed the finger at the head of the local council in the southern region of Kherson.
Vladyslav Manger is accused of "organizing the murder of Kateryna Gandzyuk," Lutsenko said on Facebook.
According to the charge sheet released by Lutsenko, Manger was guided by "personal animosity" towards Gandzyuk because she opposed "illegal logging" in the region.
Lutsenko's spokeswoman Larysa Sargan said Manger was accused of "intentionally and unlawfully causing the death of another person... with special cruelty and by prior agreement with a group of individuals".
Speaking to AFP, Sargan said that Manger was not yet arrested.
"Searches are under way in Kherson," she said.
If found guilty, the 48-year-old faces up to life in prison.
Manger was a member of the Batkivshchyna (Fatherland) political party of former prime minister Yulia Tymoshenko, a key rival of President Petro Poroshenko in the March 31 presidential election.
He was expelled from the party last week.
In August, police detained five people in connection with the case, three of whom were placed under house arrest.
In November, a former aide to a ruling party lawmaker was arrested on suspicion of being involved in the attack.
Both the European Union and the United States have called the attacks on activists unacceptable and urged authorities to bring the perpetrators to justice.
Fellow activists accused police and prosecutors of reluctance to investigate the case, insisting the detention of those possibly involved in the attack was made only after a wave of protests across the country.
Lutsenko in November submitted a letter of resignation to Poroshenko over the affair but the Ukrainian leader refused to fire him.
More than 50 attacks on anti-graft activists, environmental and human rights campaigners including five murders were recorded last year.