Maria Elena Callens, 49, was fatally shot in her Frisco, Texas, home on August 11, 2014. Her husband, Ryan Callens, 48, was killed in the same incident; both deaths occurred around 2 a.m. Their 16-year-old son, Zachary Callens, was arrested and charged in connection with the murders and allegedly confessed to his sister that he committed the shootings.

Reports say Zachary had been homeschooled and was described by neighbors as sheltered and kind. Media coverage noted he felt his parents were too strict and had been punished for not doing his homework, which was reported as a possible factor in the case. A detention hearing resulted in him being held pending further investigation, he was later tried as an adult, found guilty, and received life in prison without the possibility of parole.

Did anyone in Frisco know the Callens family or notice anything unusual about Zachary’s behavior before August 11, 2014?