Mom, Rebecca Rivera, CHARGED with dumping “Little Jacob” whose name is now confirmed: JAYDEN LOPEZ, 4. Mom’s girlfriend charged with misdemeanor, meaning she KNEW Rivera dumped Jayden. #abc13 #breaking pic.twitter.com/68TfTOvZJd — Courtney Fischer (@CourtneyABC13) June 20, 2018

EMBED >More News Videos Timeline of events after Little Jacob was found

"This case has been immensely difficult to work for our Special Agents who are parents. While our job is to investigate these types of crimes, it is especially difficult when the victim is a defenseless child," said #FBI Supervisory Special Resident Agent Bryan Gaines pic.twitter.com/PAyBqaxdNO — FBI Houston (@FBIHouston) June 20, 2018

Wow. This is a perfect example of how “Little Jacob” has affected people in #Galveston. As soon as Lisa heard Jacob identified to be Jayden Lopez, she came here to pray. #abc13 WATCH ➡️➡️➡️ pic.twitter.com/OdZ7HUcTIg — Courtney Fischer (@CourtneyABC13) June 20, 2018

EMBED >More News Videos Courtney Fischer is in Galveston where authorities will release more details about a break in the Little Jacob case.

GALVESTON, Texas (KTRK) -- Galveston police have charged two women in connection with the death of a 4-year-old boy whose body was found on a beach.In a press conference Wednesday morning, authorities identified the child as Jayden Alexander Lopez from Houston.Police say they arrested Jayden's mother, Rebecca Suzanne Rivera, and her girlfriend Dania Amezquita Gomez, who also both live in Houston.It's believed both women were present at the time of Jayden's death.Rivera has been charged with felony tampering with or fabricating physical evidence because she allegedly dumped his body. She is being held on $250,000.Gomez has been charged with a misdemeanor because police say she knew about the crime and was also present when Jayden's body was dumped on the beach. She is being held on a $100,000 bond.Authorities say Rivera was arrested on Tuesday. Gomez was arrested earlier in the week.They have not been able to find the boy's father.Investigators also revealed Wednesday morning that there was a 3-year-old child in Rivera's household. He has been removed from the home.According to police, Jayden showed signs of being malnourished. He also had bruises on his body prior to his death.Officials say they received leads, which led to the suspects' names. Someone also recognized Jayden from a photo.Authorities have been working on the case since Oct. 20, 2017, when Jayden's body was found.Until he was identified, he went by the name "Little Jacob." A sketch was released to draw help from the public along with a crime scene photo earlier this year.An exact cause of death has not yet been released.The investigation is ongoing.