A 17-year-old boy, Cristian Gasca Martinez, has been arrested and charged with the murder of 37-year-old Osvaldo Casas.

His arrest comes after a 16-year-old girl rejected his romantic advances after he was allegedly stalking her so in anger, he shot her stepfather, leaving him to die in the arms of his pregnant wife, according to prosecutors.

He was charged in Houston on October 17, according to the Fort Worth Star-Telegram.

Prosecutors argued in court that he shot and killed Casas in retaliation after the 16-year-old rejected his romantic interest.

"He was upset that basically, my daughter didn't want to date him," Judith Molina, the girl's mother, told ABC 13.

She also showed the broadcaster a log of dozens of anonymous calls made to her home, most of which she assumes were from Martinez.

Around noon on the day he was shot, Casas was warned by his neighbors that a dark vehicle had been slowly driving past his home, police said. The day prior, someone had vandalized Casas' car.

When Casas went up to the car to confront the occupant, he was shot. He wandered back to his house, but then collapsed.

Casas' pregnant wife attempted CPR to save him and called emergency responders. They found Casas unresponsive and suffering from multiple gunshot wounds.

Blanca Aguirre, Casas' mother, told KHOU that he "died in her hands."

"Osvaldo was a man of deep love and kindness," his wife wrote. "He was loved by so many in our community and never hesitated to lend a helping hand."

She also noted that their son was born on August 23, just 13 days after Casas' death.

Martinez was arrested and is being held in the Harris County Jail on a $200,000 bond.

His first court appearance was scheduled for Monday, October 21.