A Texas teen has been charged in connection to the murder of his 16-year-old girlfriend, who authorities say was shot 22 times last week after she learned of her boyfriend's affair.

Frank Deleon, 17, was arrested Monday in the murder of Diamond Alvarez, Houston police said

TEXAS AUTHORITIES INVESTIGATING POSSIBLE DOUBLE MURDER-SUICIDE

"I didn’t even ask who it was, I already knew it was him," Alvarez’s mother, Anna Machado, told FOX26 Houston, adding that she is "in pain."

A Texas teen has been charged in connection to the murder of his 16-year-old girlfriend, who authorities say was shot 22 times while walking her dog last week.

Frank Deleon, 17, was arrested Monday in the murder of 16-year-old Diamond Alvarez, Houston police said.  (Houston Police Department)

Alvarez was killed after learning Deleon was having a romantic relationship with another girl and agreeing to meet him at a park on the 5100 block of Markwood Lane near her home, according to police. The teen was walking her dog when she was killed.

Deleon appeared in court on Tuesday, where prosecutors said Diamond was shot 22 times, mostly in the back, according to the station.

Prosecutors said that Deleon appeared to be planning to leave for an extended time and had a suitcase packed at the time of his arrest.

CLICK HERE TO GET THE FOX NEWS APP

Deleon’s bond was set at $250,000.

"He doesn’t deserve a bond. I don’t think so," Machado told the station. "I don’t think that’s right. I don’t care if he had no priors. I don’t care. Whatever he did, the way he executed my daughter, and he’s walking the streets like nothing and mocking people. What kind of animal is that?"