JACKSONVILLE - Detectives used e-mail accounts and cell phone records to track a Marine charged with the slaying of a pregnant colleague, according to court documents.

The seven subpoenas released Tuesday paint a detailed picture of how federal authorities and Onslow County detectives tracked Cpl. Cesar Laurean in Mexico.

The first subpoena, filed Feb. 11, asked Internet service provider Road Runner to provide the physical location of an IP address used Jan. 21. Three days later, they asked Road Runner for the same information for another IP address used Feb. 10.

Over the next several weeks, authorities subpoenaed cell phone records from Verizon and the IP logs for two Yahoo e-mail addresses, including Laurean's wife's address.

Laurean is charged with the December murder of Marine Lance Cpl. Maria Lauterbach, who had accused him of rape. He now faces an extradition process that will take at least 60 days, and maybe as long as a year or more, depending on whether he fights efforts to return him to the United States.

Onslow County District Attorney Dewey Hudson has said that evidence recovered from the computer that Christina Laurean used allowed detectives to identify the Internet cafes in Mexico where Laurean accessed the Internet. At first, the authorities were always a step behind, he said.

But, it appears they caught up with him about April 1 when authorities asked Embarq to provide the phone numbers of all calls made to a phone number with a Jacksonville area code between 7 p.m. and 7:45 p.m. March 31.

Police arrested Laurean, 21, on April 10 as he walked along the main street in San Juan de la Vina in the Mexican municipality of Tacambaro. He was born in Guadalajara but reportedly moved to the U.S. more than 10 years ago.

Laurean and Lauterbach were assigned to the same logistics unit at Camp Lejeune, the expansive base on the coast that is home to roughly 50,000 Marines. Authorities think Laurean killed her in mid-December and have said they found the burned remains of her body and those of her fetus in his backyard.

Get $150+ in coupons in every Sunday N&O. Click here for convenient home delivery.