The incident comes amid reports from Moscow of another executive linked to a gas company who also allegedly killed his wife and daughter before committing suicide.
The nation is seeing a sharp rise in coronavirus infections as the fast-spreading Delta variant races through the country's unvaccinated young people.
Prime Minister Pedro Sánchez said the release was "the best decision for Catalonia and the best decision for Spain."
The public prosecutor said the skeleton was found "fleshless" and fully clothed. Investigators do not suspect foul play, and believe the man may have died after falling.
Tensions escalate in Spain during the housing crisis, as a video from a protest on Tuesday shows protesters spraying paint at police.
Officers arriving at the scene of a crash found the body of an elderly man in an advanced state of decomposition, strapped into the front passenger seat.
The biggest threats to rule of law, peacekeeping and individual freedoms in Spain and Europe stem from violent expressions of exclusionary nationalism and populism.
The visibly nervous suspect was stopped by traffic control in El Vendrell, Catalonia, Spain.
Nine Catalan leaders were sentenced to between nine and 13 years in prison by the Spanish supreme court on Monday.
Taber School in Barcelona said nearly a third of its children's books were "toxic."
The Embassy of Ecuador in London cut the WikiLeaks founder's web access in March, accusing him of damaging Ecuador's relations with other nations.
The suspect allegedly believed in Nazi ideology and bragged to friends about killing a gay man.
Moscow's top diplomat joked that Russia had a "tough year" interfering in every election in the world, regrets it so far failed to topple the Japanese emperor.
His departure would lead to the Third Spanish Republic, new governments in Madrid and Barcelona, and to a constitutional assembly.
90 percent of Catalans voted for independence on October 1, but the turnout was only 43 percent.
Carles Puigdemont, the region's president, addressed the parliament Tuesday.
Carles Puigdemont's speech was met with cheers from the crowd.
The Spanish constitutional court has suspended the vote and the central government considers it to be illegal.
Spain is far from descending into full-scale conflict. But the Catalan independence debate has the potential to prove seriously destabilizing.