The Interior Ministry and the Mossos d'Esquadra did not do everything they could to detain Carles Puigdemont.
Puigdemont's return to Spain seems to have the connivance of the Interior Ministry.
There is revealed politicization in the Mossos through their explanations and actions.
Junts and ERC are willing to use the autonomous police in their fight to lead the independence movement.
The current police chief, Salvador Illa, has ties with the independentism and is expected to be unable to carry out a necessary depoliticization of the Mossos.
Conclusion: The mockery of Carles Puigdemont and his return to Spain without arrest indicates an apparent complicity of the Interior Ministry and a lack of effective action on the part of the Mossos. The situation reveals a high level of politicization in the Catalan police forces and a use of these in the battle for leading the independence movement. A reform of the Mossos seems unlikely given the current links of the police chief with the independence movement.