A man has been arrested for allegedly stabbing his mother to death and injuring his sister inside their Babylon home Friday morning.

Police say 33-year-old Joseph Kearns was taken into custody for the Livingston Avenue stabbings. Investigators say the incident stemmed from a dispute Thursday afternoon, apparently over whether Kearns was taking the correct medication.

Police say Kearns, who is adopted, left the home after the argument, prompting a search for him involving K-9 and aviation units due to concerns about his condition. Kearns returned home just after 7 a.m. Friday, which is when police say he stabbed the two family members, then fled to a nearby wooded area, where he was later arrested.

Mina Kearns, 79, died at the hospital. Kathleen Kearns, 59, is listed in stable condition with stab wounds to her head and face.

Neighbors describe Joseph Kearns as a troubled man with mental health and drug issues. They say Mina Kearns spent her life dedicated to her nine biological children, and to Joseph, whom she had adopted as a toddler.

Kearns is expected to be arraigned today on murder and assault charges.