Do you remember when Senator McCain accused Senator Paul of "working for Vladimir Putin”?
If you don't remember, it was all because of Scary Russia trying to overthrow the government of Montenegro.

According to indictments, the plotters—masterminded by the two Russian nationals—planned to infiltrate a rally by Montenegro’s pro-Russian opposition outside the country’s Parliament on election day. The plotters would then shoot police officers guarding the building, aiming to spark a mêlée that would result in people storming the building and declaring victory for the opposition.

Senator McCain described it as “the most disturbing indication of Putin’s violent ambitions” and that it served as “a warning to every American that we cannot treat Russia’s interference in our 2016 election as an isolated incident.”
Because of this bold attempt at overthrowing a democracy, Montenegro bravely "defied Russia" and joined NATO.
Meanwhile, the political opposition leaders which were obviously in league with a foreign conspiracy, have been stripped of legal immunity.
Case closed, right?

Not so fast.

However, the opposition in Montenegro and some anti-government media outlets continue to claim that the coup was staged by the authorities to ensure Djukanovic won another election.
On Tuesday, the Democratic Front presented what it claimed to be an evidence that the weapons seized by the prosecution on October 16 are owned by the Montenegrin police.
In November, the prosecution showed off the seized arms, which were supposed to prove the terror attack was planned in Montenegro.
“We all know that this weapon was taken from the Interior Ministry... to set up the Front,” Front official Slaven Radunovic told reporters on Tuesday, showing a document that allegedly proved his claims.
Asked whether the Front can prove the authenticity of the documents it presented, Radunovic said that the paper was part of the court files in the coup case “which were set aside and which someone hoped would not be found”.
The prosecution and police did not comment on the Front’s claims by the time of publication.

President Milo Đukanović, once famously indicted by the Italian anti-Mafia unit, is one of the 20 richest world leaders. The Independent described him as "Mysteriously wealthy".

Right from the start, this "coup" seemed poorly planned and sloppy.

Al-Jazeera

The DF claim that Djukanovic has for years plundered state assets for personal enrichment and that Montenegro has endured decades of state-sponsored human rights violations including the murder of government critics. Allegations of the opposition's involvement in an armed plot to overthrow the ruling elite should thus be seen in the same light.
"Our political opponents will do anything to protect what they have stolen," Mandic says. "This election was the most fraudulent we've ever had. First there was the traditional method of buying votes, bringing in foreigners to vote, but now we have a new method of fraud - namely, carrying out a fake coup."
Indeed the key prosecution witness, Mirko Velimirovic, an alleged coup-plotter, had already given wildly conflicting accounts regarding the weapon which was supposed to be used to assassinate Prime Minister Djukanovic.

It took months before the government actually produced the "coup plotters" cache of weapons.

When we handed him some police documents showing telephone intercepts of conversations between two of the alleged coup-plotters in which inexplicably both caller and receiver were using the same telephone number at the same time, he seemed unfazed: "I'm not an expert of that. I heard it was adjusted like that."

WarisBoring

In 2014, the collaborative Organized Crime and Corruption Report Project named the Montenegrin leader the second most corrupt person of the year....
In a highly unusual and normally impossible move, police released the prime suspect in the October 2016 plot, Aleksandar Sindjelic, as a “protected witness” in exchange for his cooperation. To make the deal legally permissible, the government claimed it has changed the charges to fit the circumstances.

Antiwar

The alleged leader of the “plot” has been granted a plea deal, and is now spinning a tale of intrigue so murky that light cannot penetrate its depths. One version has it that Russian “special forces” “disguised as a Cossack folk band” arrived on the scene to “recruit” those plotting to off Djukanovic. Those are some very special forces indeed.

This is obviously a "kill two birds with one stone" plot.
A deeply corrupt president accuses the political opposition of plotting with Russia against him, thus getting the backing of the United States, which will embrace literally anything that is anti-Russia.
In doing so, he crushes his opponents and gets a whole bunch of support and NATO weapons for free. Plus, the outside world agrees to overlook his corruption, and the transparently faked evidence of the case.
It's a win-win.