Trial
López was set to be tried alongside four students, Marco Coello, Christian Holdack, Ángel González, and Demian Martin. He petitioned the court to release these students, who had been arrested in February. Judge Susana Barreiros ordered the release of all but Christian Holdack. At the beginning of his trial, López's defence was barred from entering the court to present evidence and witnesses. For López's defense, only 1 of 63 witnesses were allowed to be presented in court while over 100 witnesses were allowed to presented for the prosecution. Since López was detained on 18 February 2014, he was held in Ramo Verde Prison while he was tried. López's court dates were on 23 July, 6 August, 13 August and 28 August. At each of those trials, the prosecution presented evidence against López, yet his defense was allegedly not able to present any information or evidence supporting him. After the court session of 28 August, the case was deferred for a third time to 10 September. The 28 August court session was also under the presence of a delegate of the European Union, allegedly due to concerns about the trial's process. In November 2014, the Venezuelan court rejected the United Nations' Working Group on Arbitrary Detentions request to release López from prison. The United Nations, along with several other organizations and institutions, have criticized the trial due to a lack of due process in the court's handling of the case, as well as a lack of fair hearing for the defense, who had under three hours to defend themselves to the government's 600 hours. The government's use of delays to silence witnesses for the defense, as well as their direct barring of 58 of 60 witnesses, was also condemned.
On 4 January 2015, in response to US requests to free López, Maduro offered to exchange López "man to man" for Oscar López Rivera, a former FALN member imprisoned in the U.S. for seditious conspiracy, use of force to commit robbery, interstate transportation of firearms, and conspiracy to transport explosives with intent to destroy government property. The Obama administration commuted López Rivera's sentence, with his release in May 2017.
In March 2015, former socialist Prime Minister of Spain Felipe González agreed to take over the defense of López in his trial after his family requested his assistance. In the roughly 700 hours of court testimonies, López's defense was given less than three hours and was not allotted many resources or due process.
On 10 September 2015, after spending over a year and a half imprisoned in Ramo Verde, López's trial was set to conclude. According to López's lawyers, Judge Susana Barreiros suddenly finished proceedings the preceding week, with López only permitted to use a few witnesses while the prosecution was granted the use of hundreds of witnesses.
At the courthouse, about 200 supporters of López gathered while government supporters grouped together with a band singing folk songs supporting a guilty verdict against López. The gatherings grew violent after government supporters attacked López supporters and left them with multiple injuries and one death. Before the conclusion of the trial, López addressed the courtroom with a three-hour speech. Judge Susana Barreiros found López guilty and gave him the maximum sentence of 13 years, 9 months, 7 days, and 12 hours in Ramo Verde military prison for public incitement of violence; student movement co-defendants received sentences ranging from 4 and 10 years. López was then allowed to spend moments with his family before he was sent back to his isolation cell in Ramo Verde. López's supporters then moved to another part of the city to demonstrate while the banging of pots by other Venezuelans could be heard from their homes.
The European Union, Amnesty International, Human Rights Watch and several human rights organizations have condemned the arrest and defined it as politically motivated. Several figures involved with his trial later declared that they were pressured by the Venezuelan government to detain López.
On 23 October 2015, Franklin Nieves, a prosecutor in López's trial who fled to the United States, stated that the trial was a "farce" and that he was pressured by high officials in the Venezuelan government. Nieves said that Brigadier General Manuel Gregorio Bernal Martinez, then head of SEBIN, was directly ordered by President Maduro to arrest López and others. When Nieves asked for documentation of any crimes, Bernal did not have any but a SEBIN officer created the documents needed to persecute López, with Nieves stating, "They made up those facts in the moment." Nieves also accused Diosdado Cabello, leader of the National Assembly, of directing the López trial as well. Luisa Ortega Díaz, the Chief Prosecutor of Venezuela who reportedly asked prosecutors to build evidence against López, denied Nieves' allegations, saying that "If he was pressured, it was undoubtedly by foreign elements." Luisa Ortega would later say that she was pressured by Diosdado Cabello to accuse López of the deaths of Bassil Da Costa and Juan Montoya. Ralenis Tovar, the judge that signed the arrest warrant against Leopoldo, declared that she signed the warrant because she felt scared after being threatened with becoming a "second Lourdes Afiuni judge".
Human rights groups consider López as "Latin America's most prominent political prisoner". Multiple organizations denounced López's detention and published discussions about it in order to bring attention to his arrest. Human Rights Watch said: "The Venezuelan government has openly embraced the classic tactics of an authoritarian regime, jailing its opponents, muzzling the media, and intimidating civil society." HRW further accused the Maduro government of blaming opposition leaders, including López, for violence. The Human Rights Foundation, founded and run by López's first cousin, Thor Halvorssen Mendoza, declared López a prisoner of conscience and joined other international organizations in calling for his immediate release. "With López's imprisonment and the brutally repressive tactics that police, armed forces, and paramilitary groups are using against his supporters, the Venezuelan state has lost any democratic façade it may have had", said HRF chairman Garry Kasparov. Former students from Kenyon College put forth an effort to support López since he was detained and helped create freeleopoldo.com. Editorial columns from The New York Times and The Washington Post have also called for his release.
At the 2014 Clinton Global Initiative meeting, U.S. President Barack Obama called for the release of López saying, "We stand in solidarity with those who are detained at this very moment." The United Nations Working Group on Arbitrary Detention ruled in 2014 that López was detained arbitrarily and that the Venezuelan government "violated several of their civil, political and constitutional rights" while demanding his immediate release. The UN High Commissioner for Human Rights, Zeid Ra'ad al-Hussein, called for the immediate release of López and all Venezuelans arrested during the 2014 protests. In November 2014, Socialist International agreed with the UN's ruling, calling López's arrest arbitrary. On 19 December 2014, the chief diplomat of the European Union, Federica Mogherini, said that she was "seriously concerned" about "continuous arbitrary arrests" in Venezuela, with the EU resolution noting that Leopoldo López "suffered physical and psychological torture" and also denounced the situations of opposition mayors Daniel Ceballos and Vicencio Scarano.
The Venezuelan government condemned the statements by the United States and the United Nations demanding them to not interfere in Venezuelan affairs. The Venezuelan government replied to the UN High Commissioner for Human Rights with a letter directed to him stating that it was "senseless" to release López and claimed that Prince Zeid bin Ra'ad's statements were "undoubtedly part of the international media manipulation that has been denounced by the top leadership of the Bolivarian Government".
In 2016, the Dalai Lama supported López, with human rights attorney Tamara Sujú sharing a picture on Twitter of the Dalai Lama stating that he continued to pray for López.
Amnesty International said, "The charges brought against Venezuelan opposition leader Leopoldo López smack of a politically motivated attempt to silence dissent in the country." Guadalupe Marengo, Amnesty International Americas Programme Deputy Director, called on Venezuelan authorities to "either present solid evidence to substantiate the charges against López or release him immediately and unconditionally ... Amnesty International has not seen evidence to substantiate these charges. This is an affront to justice and free assembly". After López was sentenced to 13 years in prison, Amnesty International declared that, "Leopoldo López is a prisoner of conscience and should be immediately released without conditions".