By RACHEL SLADE / The Dallas Morning News

A 20-year-old man is accused in the March death of his 2-month-old daughter after he admitted to becoming frustrated with her crying and shaking her, Garland police said today.

Eloy Bruce Sanchez Jr., who was charged with capital murder, was being held in Dallas County jail in lieu of $1 million bond. He was taken into custody June 27 about a week after the Dallas County medical examiner ruled his daughter’s death a homicide.

On the evening of March 29, Garland police found Lanah Santiago-Sanchez not breathing when they arrived at the home in the 1000 block of Alamo Drive. The infant was transported to Baylor Medical Center at Garland and pronounced dead.

When first questioned, Mr. Sanchez told officers he had fed and burped his daughter before putting her down for a nap, according to an affidavit. Mr. Sanchez told police he had been watching television when he noticed his daughter was not breathing and pale. He started CPR and heard little breaths coming from her. He then hit her in the back and baby formula came out her nose.

Christine Hernandez told police that she heard her niece crying and slapping sounds coming from Mr. Sanchez’s locked bedroom around 6 p.m., according to the affidavit. She sent a text message to her mom's co-worker soon after when she heard muffled screams and noises that made her believe the baby was being shaken.

“Come home ASAP he’s shaking her and covering her so she doesn’t scream and now she’s making a bunch of weird noises,” the text message read.

Darren Stewart, who was working with Mr. Sanchez’s mother-in-law Frances Hernandez received the text, and Ms. Hernandez returned home to discover her granddaughter wasn’t breathing. Ms. Hernandez called police.

After his arrest, Mr. Sanchez admitted to a detective that he had become frustrated with Lanah’s crying before her death and shaken her before putting her down for a nap, police said.

Lanah’s mother, 17-year-old Erica Santiago, was not home at the time of the incident, said Garland police spokesman Joe Harn. Before his arrest, Ms. Santiago severed ties with Mr. Sanchez and moved back into her parent’s house.