Dulce Maria Alavez turns 7 today. 

"It's been almost two years since she disappeared at Bridgeton City New Jersey Park," says the voice behind the camera. "I'm really, really sad and hurt. I don't know where she is. I don't know who she is with. I don't know if my baby girl is ok. Like everyone, I want to know where she is."

We have not independently confirmed with investigators if that is indeed Dulce's father, but the girl's maternal  grandmother, Norma Perez, tells me that it is him talking in the video.

The man says he saw his daughter as much as possible until his deportation right before Christmas in 2018. He vehemently denies having anything to do with Dulce's disappearance.

 "I was in Mexico when everything happened. For those who think that I took my baby girl, let me tell you that I got nothing to do with it."

Dulce was playing with her little brother near the swings at Bridgeton City Park on September 16, 2019. Their mother, Noema Alavez-Perez, and a younger relative stayed in the car some 30 yards away. Many, in the court of public opinion, believe Dulce's mother knows what happened to her daughter, but she has not been named a person of interest or suspect in the case. According to the FBI, Noema and her family have been questioned multiple times and her cell phones have also been checked. 

The FBI believes Dulce was possibly abducted by a Hispanic man seen at the playground at the same time she vanished, but local authorities are not ruling anyone or any theory out just yet. 

The National Center for Missing and Exploited Children is also working on an age-progressed image of Dulce to show what she would look like today. 

"Let's all pray for my daughter. Please, don't lose hope that Dulce Maria Alavez will be found soon."

For 44 years, more than 100 Pennsylvania State Police investigators worked tirelessly to solve the murder of a young, unidentified pregnant female they called Beth Doe.

Fast forward to March 2021. Suddenly the pieces of this decades-old puzzle started to fall into place. Thanks to forensic genealogy, investigators now know 'Beth Doe' was 15-year-old Evelyn Colon of Jersey City, New Jersey. Colon was strangled, shot, and dismembered allegedly by her then 19-year-old boyfriend, Luis Sierra, of Ozone Park, New York.

​​"He was the last person to have been with Evelyn as they were living in an apartment in Jersey City in 1976," said Lt. Devon Brutosky, Troop N criminal investigation section commander. 

Troopers, past and present, came together at a news conference at Lehighton Park Wednesday. They thanked the multiple agencies that played a part in solving the case, including the labs that examined the remains of the young mother and her full-term daughter: DNA Labs International of Florida, University of North Texas and NamUS, and Othram Inc. of Texas. 

Earlier this year, Othram enhanced Beth Doe's DNA profile and uploaded it to a public DNA database. In late March they made the connection to the victim's nephew, Luis Colon Jr., who, according to his family, had uploaded his profile to a public DNA database with the hope of finding his aunt, Evelyn. Colon put investigators in contact with his father, Evelyn's older brother, who now lives in Stroudsburg, PA.

"We're elated that we can bring this to a conclusion," Brutosky said.

Investigators are not releasing many details about the case or their suspect. Sierra, a bus driver, now 63, was extradited to Pennsylvania on April 13. He's being held without bail at the Carbon County Correctional facility in Nesquehoning.

Despite an arrest in the case, investigators are still looking for information about Sierra, who was 19 when he allegedly killed Evelyn Colon. The mutilated remains of the 15-year-old from Jersey City and her full-term daughter were stuffed in three suitcases found along the banks of the Lehigh River in Carbon County, PA, on December 20, 1976. Her family never reported her missing.

Investigators are asking the public to call the tip-line if they knew Sierra back in the 1970's. Sierra, according to PSP, was a student at James Ferris High School in Jersey City, New Jersey. 

If you have information that could help Pennsylvania State Police, please call the tip line: 1-800-4PA-TIPS. Reference Case No. 1956.