"She was the most wonderful daughter a mother could ask for and I can't believe I'll never see her again," Gadd said in an interview Monday.
Jennifer's boyfriend, Eric Griffin, has been arrested and charged with domestic assault and battery.
"He murdered her. He murdered her," Gadd said. "There's no two ways about it. I want him to get the most they can give him."
Authorities said that, when they found Jennifer Kalicki after 8 a.m. Sunday, she was already dead. They could see trauma on her face, neck and extremities. On Saturday morning, 24 hours before Kalicki was found, authorities said, she sent disturbing texts to Eric Griffin's sister.
"He's ripped the door open. Choked me, slammed me to the ground," the text messages read. "Please help me. He's losing it...I just need help. I'm tired of him making me the victim."
"During those text messages, the victim was begging the defendant's sister for help," prosecutor Suzanne Wiseman said in court. "She also indicated in those text messages that the defendant slammed her on the ground and the defendant had strangled her."
Griffin's sister never called the police. At the time of Kalicki's death, Griffin had just gotten out of the Billerica House of Correction, where he was held on a drug charge.
Griffin was released from jail on Wednesday. The only reason he got out is because Kalicki went to Lowell District Court and paid his $250 bail. Half a week later, Kalicki was dead- - at the hands of the man she helped get out of jail, investigators said.
"I just hate him. I hate him so much," Gadd said. "And he's going to try and say he's sorry. That's the type of person he is. He's not sorry. He's just sorry he got caught."
A Lowell District Court Judge has revoked Griffin's bail. Griffin is due back in court Friday for a dangerousness hearing.