en.wikipedia.org/wiki/%C3%81lvaro_Uribe

This sentence links Uribe’s August 2020 house arrest to the El Aro and La Granja massacre investigations, but contemporaneous reporting on the Supreme Court order says the detention was imposed in the witness-tampering / bribery of witnesses / procedural fraud case.

The Associated Press reported on August 4, 2020 that Uribe would be placed under house arrest "while the Supreme Court advances a witness tampering investigation against him" and that magistrates were probing accusations that he had a role in bribing potential witnesses. Reuters likewise reported on October 10, 2020 that Uribe was under investigation for alleged witness tampering.

Those sources distinguish that case from other investigations involving alleged paramilitary massacres. So the article is incorrect to say the 2020 house arrest itself was imposed as part of the El Aro/La Granja massacre probes.

This sentence misstates both who ordered Uribe’s release and why.

On 10 October 2020, Reuters reported that Judge Clara Ximena Salcedo lifted Uribe’s house-arrest order. The report says the judge granted the defense request after the case had been transferred to the Attorney General’s Office following Uribe’s resignation from the Senate. It does not say the Supreme Court ruled there was insufficient evidence.

El País likewise reported that a judge of control of guarantees ordered Uribe’s freedom and specifically clarified that her ruling did not refer to nullifying the Supreme Court’s actions. That directly contradicts the article’s claim that the Supreme Court itself ruled there was a lack of evidence.

So the release was a judicial decision by a lower-court judge in a procedural context after the case transfer, not a Supreme Court determination that the evidence was lacking.

This claim overstates and misdescribes what UN investigators found at La Macarena, Meta.

The UN Human Rights Office in Colombia reported in 2010 that it had not found evidence of a mass grave at the cemetery. Instead, it documented at least 446 unidentified persons who had been buried individually in the municipal cemetery and had been reported as killed in combat by the public force since 2002.

A later UN report repeated the same conclusion in English: "Even though no evidence of a mass grave was found, at least 446 unidentified people were buried in the municipal cemetery" after being reported as killed in combat between 2002 and 2010.

So the statement that a 2,000-corpse mass grave was discovered is contradicted by the UN’s own findings. The issue was serious, but it was not a confirmed 2,000-body mass grave, nor a finding the UN described as the largest in South America.

This date is off by at least a month.

A 1982 publication from the Universidad de Antioquia is titled "Discurso de posesión del alcalde metropolitano de Medellín - Agosto 26 de 1982" and identifies Álvaro Uribe Vélez as the author, showing he was taking office as mayor on August 26, 1982.

A CIDOB political profile likewise says that Uribe left Civil Aeronautics in August 1982 to take office as mayor of Medellín. So the article’s statement that he became mayor in October 1982 is inconsistent with the documentary record.