A man was arrested in Marana on suspicion of stabbing several people last week.
Marana Police responded to reports of a stabbing at a residence near North Cortaro Road on Thursday, May 9. The man, identified as 21-year-old Thomas O'Brien, allegedly stabbed his parents and grandmother, according to Marana Police.
One of the victims sustained life-threatening injuries, Marana Police said. All three victims were transported to a local hospital.
One of the victims was upgraded to stable condition and released from the hospital.
The investigation is ongoing.
