What's the point of having someone take a breathalyzer in order for them to drive, if the car starts before that breathalyzer is used?

That's a big question that's being answered as an Arlington woman was killed after her car was struck by someone who was driving and taking a breathalyzer at the same time.

Alexis Butler, 18, was backing out of her driveway when the passenger side of her car was struck by a pick up truck. During an investigation of the accident, police noticed there were no skid marks on the road, indicating the driver of the pick up never tried to slow down. The driver did admit to looking down for 3 to 4 seconds to perform a breath test on his court-ordered ignition interlock device.

“Number one thing we’ll look at is tracking down the original court order to read exactly what it said,” said Lt. Chris Cook, with the Arlington Police Department. “And more importantly for us, as a police department, is to determine what the manufacturer recommendation is as far as the guidelines in how to operate this type of equipment. It’s very concerning to us, as a police department, that an individual may be operating some type of ignition equipment while they’re in a moving vehicle.”

Sooooo, what's the point of that breath test? I could be wrong, but I thought the whole point was you had to blow into the breathalyzer with no alcohol in your system before your car will even start. I guess we'll just have to wait for answers on this one.