Constables in the United States
While Constables primarily serve the Courts, they belong to the executive branch of government.
Supreme Court of Spain
The Supreme Court is one of the three branches of the Spanish government, alongside the legislature and the executiveTo ensure its independence, the Supreme Court has the prerogative to enforce its actions under the principle of obedience to final judicial decisions enshrined in the Constitution. Also, most its resolutions are reliable since they are solutions to appeal against the considered decisions of lower courts.