The mystery of who killed "Castro Valley's Jane Doe" appears to be solved, NBC11 News reported.

NBC11 reporter Damian Trujillo reported that Alameda County investigators announced Friday they have identified the person known as Jane Doe.

Jane Doe Case In Pictures

Trujillo said they also think they have found the teenager's mother, but are waiting on DNA results before making her name public.

Investigators held a news conference Friday in Mexico and showed a picture of the woman they believe is the victim of a homicide in Castro Valley three years ago.

They would not allow the media to shoot any footage of the photo, NBC11 reported.

Alameda County sheriff's detectives handed out thousands of fliers in Yahualica, Mexico, this week, hoping to find the teenager's family.

NBC11's Damian Trujillo traveled with investigators. He reported that police may also be close to issuing an arrest warrant in the case.

The body of the 5-foot 1-inch, 110-pound girl was found inside a green canvas bag behind a Carrows restaurant in Castro Valley on May 1, 2003.

She had a rag stuffed down her throat and had died of asphyxiation about 10 days earlier.

Authorities estimated she was 15 to 17 years old and a Latina.

Investigators told NBC11 the case has progressed considerably in the last six weeks since authorities identified former Carrows employee Miguel Angel Nunez Castenada, 27, as a "person of interest."

Investigators believe that Castenada and the girl are from the same part of Mexico, had some type of relationship and may have lived together briefly in a house on Smalley Avenue in Hayward, Sgt. Scott Dudek said.

Dudek said authorities haven't confirmed the nature of the relationship, but his theory is that Castenada's and the girl's parents knew each other and that the pair had something of a brother-sister relationship, but that Castenada wanted it to be more.

But Dudek said he doesn't know if Castenada was involved in the girl's death or what the motive was for the slaying.

Castenada was interviewed by sheriff's investigators in San Leandro about six weeks ago but fled the area when investigators and federal immigration authorities served search warrants at two homes in unincorporated Hayward to gather evidence in the case, Dudek said.

Castenada had previously been deported to Mexico and currently is in violation of his deportation order.

Dudek said authorities believed that Castenada was in Yahualica, but expected him to leave before the sheriff's team arrived.

However, he said he thinks authorities will be able to arrest Castenada and extradite him to the U.S. if there's enough evidence to charge him because the case has been highly publicized and Mexican officials are outraged by the nature of the girl's death.

"The whole case is appalling to them and to us," Dudek said.

Dudek said the investigation also has been helped by witnesses who have come forward to say that the girl's name was either Adriana or Ariana.

He said investigators hope to learn her full name on this trip both for "humanitarian reasons" and for investigative purposes.

"Identifying her will be huge for the murder investigation," Dudek said.

Dudek said authorities had long believed that both the girl and Castenada were from that area and that she left the region in March or April of 2003 either to come with him to the Bay Area or meet him in the Bay Area.

Yahualica is located 72 miles north of Guadalajara in the state of Jalisco.