MEXICO CITY (AP) — The extradition of drug trafficker Rafael Caro Quintero, captured in the mountains of northwest Mexico, will not happen quickly, according to a judge’s ruling published Monday.

The Mexican judge issued what amounts to an injunction preventing Caro Quintero from being sent to the United States without going through the formal extradition process. The judge also ruled that he must remain in the maximum security prison west of the capital where he was taken after his capture while that process plays out.

After Caro Quintero’s arrest Friday, the US government said it would seek his “immediate extradition.” That process began Saturday, but as expected, Caro Quintero’s lawyers intervened.

The extradition process can often be drawn out depending on the target’s willingness to fight it and the governments’ desire to speed it along.

A judge reviews the United States’ extradition request, including evidence supporting the allegations, and gives an opinion to the Foreign Affairs ministry on whether it meets criteria for extradition. Even if the ministry decides that the extradition should proceed, Caro Quintero would have the ability to appeal.

In the case of Joaquín “El Chapo” Guzmán, the former leader of the Sinaloa cartel now serving a life sentence in the United States, the process took a year.

Caro Quintero, who was convicted in Mexico for the murder of DEA agent Enrique “Kiki” Camarena and a Mexican pilot in 1985 was captured by Mexican marines Friday in the state of Sinaloa.

On Monday, President Andrés Manuel López Obrador said the arrest showed the Mexican government no longer protects criminals.

“If there is an arrest order it has to be executed and if support is asked of the (Mexican) government it’s executed, whoever it is, it’s a routine affair, they (the armed forces) don’t need to consult me,” López Obrador said during his daily news conference.

Asked if the DEA had located Caro Quintero and told Mexico’s marines where to find him, López Obrador said “no.” He said the marines had developed the intelligence on where the 69-year-old drug lord was hiding was and acted on it.

The arrest came three days after López Obrador met with President Joe Biden in Washington. And DEA Administrator Anne Milgram had made it sound like a collaborative effort in a message to the agency late Friday.