SAN JOSE -- From the start, Pedro Medina was the prime suspect in the 2012 shooting deaths of a couple in front of one of their children at a downtown home.

Medina eluded capture for months, but he was arrested a year ago in Mexico. Now after finally being extradited back to California, the 31-year-old sits in a Santa Clara County jail cell, waiting to face charges he murdered Marybel Jimenez, 27, and Pedro Jimenez, 26.

Police and relatives of the couple say Medina dated Marybel while she was separated from her husband. When Marybel reunited with Pedro, Medina vowed to kill them, according to Jimenez family members.

Medina did exactly that, police said.

Family members said the couple took the threats seriously. The couple reported them to police, stayed with relatives and considered moving to Mexico to avoid a confrontation with Medina, family members said in 2012.

But after some time passed, the couple thought Medina may have moved on and they went back to their home in the 300 block of North Seventh Street.

On July 23, 2012, San Jose police responded to their fourplex at 2:49 a.m. after Maribel Jimenez called 911 to say Medina was outside banging on her door, according to a police report. Patrol officers checked the area but left after they could not find Medina.

About 90 minutes later police returned to the same location after receiving reports of shots fired. When officers arrived they found the couple shot to death inside the home as neighbors consoled the pair's three children.

Police identified Medina, who has a criminal record dating to 2001, as thegunman, but they believed he quickly went to Southern California on the way to Mexico.

Medina was arrested in April 2013 by Mexican Federal Police working with the U.S. Marshal Service in Guadalajara.

"On behalf of the San Jose Police Department, we would like to thank the Office of the Mexican Attorney-General (PGR) in Mexico and United States Marshals Office for assisting us in the apprehension of this double murder suspect," said Lt. Mike Kihmm, who oversees the homicide unit.

Contact Mark Gomez at 408-920-5869. Follow him on Twitter @MarkMgomez.