A Rochester Hills woman used Apple's voice system Siri to call police after her fiancé attacked her, according to the Oakland County Sheriff's Office.
Deputies say the woman's fiancé was drinking and started arguing with her, and then he began ramming her face into a closet door.
She grabbed a knife to protect herself, but the man grabbed a large hunting knife and told her to put the knife down or he was going to stab her in the neck.
Deputies say that when she threw the knife down, the man held his knife to her face and said he was going to kill her.
According to deputies, she called 911 using Siri before the man grabbed her phone and ran out the back door.
When they arrived, the man was gone and they could not track him down.
About three hours later, the victim called deputies to help get her keys that were locked in her car.
After the deputy unlocked the car, he heard a noise coming from in the trunk. It turned out the suspect was hiding inside. He was arrested and taken to jail.