A Santa Rosa man is in custody on suspicion of threatening his roommate's life and then killing her dog after she ran for help, sheriff's deputies said Wednesday.

The incident on the 5000 block of Hall Road west of Santa Rosa was reported around 6:30 p.m. on Christmas Eve, according to the Sonoma County Sheriff's Office.

A woman had called for help from a neighbor's home. When deputies arrived at the scene, she explained that her roommate had come home and was talking incoherently. The woman said her roommate grabbed her head and was pulling her hair and slapping her, deputies said. She said the suspect then released her and told her he was going to the kitchen to get a knife, and then he was going to "eat her," deputies said.

Fearing for her life, the victim fled to her neighbor's home.

Deputies found the suspect, Alan Evans, 35, in his living room and took him into custody. But they noticed he had blood on his hands and clothing, so they checked the area around the residence for another victim.

Deputies then found the woman's dog, a small terrier, which had been stabbed and was dead under the suspect's vehicle.

Evans was arrested on suspicion of assault with a deadly weapon, battery, terrorist threats and cruelty to an animal. He was booked into the Sonoma County Jail and bail was set at $250,000.

A 35-year-old man named Alan Evans suffered serious injuries in what sheriff's deputies described as an unprovoked machete attack on Hall Road in October. Sheriff's officials could not be reached Wednesday evening to confirm whether the machete attack victim was also the suspect in Tuesday's incident.