G.R. No. 140823 - Calvan vs. Court of Appeals

On August 2, 1999, during a shootout at a sitio in Pagudpud, Ilocos Norte, Mayor Reynolan T. Sales fatally shot former Mayor Rafael Benemerito.
Following the incident, Sales surrendered his handgun and voluntarily placed himself under the custody of the Municipal Police, later being transferred to the Provincial Jail of Ilocos Norte.

On August 3, 1999, Police Chief Inspector Crispin Aguno and Thelma Benemerito (wife of the victim) filed a criminal complaint for murder against Mayor Sales at the Municipal Circuit Trial Court (MCTC) of Adams-Baagui-Dumalueg-Pagudpud, Branch 127.
Criminal Case No. 9448-P, titled “People of the Philippines vs. Mayor Reynolan T. Sales,” was docketed, prompting Judge Melvyn U. Calvan to conduct an immediate “preliminary examination” and subsequently issue an order and warrant of arrest without allowing Sales to file a counter-affidavit or present evidence in his favor.

On August 4, 1999, Mayor Sales was formally transferred from the Provincial PNP headquarters to the Provincial Jail under the custody of the Provincial Warden.
On August 5, 1999, after conducting a preliminary examination under Section 6(b) of Rule 112 of the 1989 Rules in Criminal Procedure, Judge Calvan issued a two-page resolution that ultimately forwarded the case records to the Office of the Provincial Prosecutor for further action.

Mayor Sales contended that his right to due process was violated due to the abrupt and perfunctory termination of the preliminary investigation and the issuance of the arrest warrant, particularly noting that the judge was related within the third civil degree of affinity to one of the complainants.
Consequently, Sales filed a combined Petition for Habeas Corpus and Certiorari before the Court of Appeals, challenging the legality of the arrest order and alleging judicial bias due to disqualification.

Initially, on August 30, 1999, the Court of Appeals dismissed the petition.
On September 19, 1999, Mayor Sales withdrew the petition for certiorari, leaving the petition for habeas corpus as the sole remedy.
A hearing on the remaining petition was held on October 5, 1999, where both sides presented their arguments and supporting documents.

On November 18, 1999, the Court of Appeals granted the petition for habeas corpus, ordering the release of Mayor Sales subject to the outcome of a proper preliminary investigation.
A petition for review was filed with the Supreme Court (by the Office of the Solicitor General representing Judge Calvan, the Provincial Warden, and the People of the Philippines) seeking to overturn the Court of Appeals’ decision.
The Supreme Court, on July 5, 2000, denied the petition for review and the subsequent motion for reconsideration filed by the Solicitor General, thus upholding the appellate ruling.

Whether the petition for habeas corpus was the appropriate remedy to challenge the legality of the order and warrant of arrest issued by Judge Calvan.
Determination of whether the inquiry in a habeas corpus petition should be limited solely to the validity of detention or may extend to scrutinizing the procedural irregularities (including the judge’s conduct and the issuance of the warrant).

Whether Judge Calvan’s relationship (within the third civil degree of affinity) with complainant Thelma Benemerito warranted his disqualification under Section 1, Rule 137 of the Rules of Court.
Whether the perceived judicial bias and lack of impartiality resulting from such a relationship violated the due process rights of Mayor Sales.

Whether the conduct of the preliminary investigation—being incomplete, not following the prescribed procedure (including failure to secure sworn testimony and to allow a counter-affidavit)—renders the resultant order and warrant of arrest illegal.
Whether such procedural lapses can be remedied post facto through an extraordinary remedy like the writ of habeas corpus.