A jury has convicted a Texas mother of mutilating her infant son by cutting off his genitals two years ago.

Jurors deliberated for about three hours on Friday before finding Katherine Nadal guilty of first-degree felony injury to a child.

The jury will now hear evidence in the punishment phase of the trial before deciding Nadal's sentence. She faces up to life in prison.

Prosecutors told jurors the 28-year-old mother was high on drugs when she mutilated her then-5-week-old son, Holden Gothia, with an unknown sharp instrument in their suburban Houston apartment in March 2007.

Nadal's defense attorneys blamed the attack on the family dog, a 6- to 7-pound dachshund.