The Express-News has the story.
The stabbing call was a false alarm.
The crash occurred before 5 p.m. in the 300 block of Paul Street at the Piedmont Street intersection when the officer, in response to a call of a stabbing on the same street, collided with the driver's side door of a brown Cadillac, [San Antonio Police Department Lt. Scott Bell] said.
When the car hit the house, the front of it caught on fire and in turn ignited the corner of the small frame home, Bell said.
He said the driver of the Cadillac fled the scene, but officers found someone believed to be the driver about an hour later a few blocks away. He was taken into custody, but Bell was unsure if any charges would be filed.