Cops can SO easily fake a breathalyzer failure. NEVER go for the Breathalyzer. ALWAYS require a blood test, administered by a medical professional who is NOT a cop!
Of course, if you ARE drunk, it wont matter anyway, unless where you are arrested has varying degrees of DUI according to the test result. But I KNOW people who have failed breathalyzers though they did NOT drink. One girl I know got hit by a van full of drunken cops and their wives returning from a Christmas party WITH OPEN CONTAINERS OF LIQUOR IN THE VAN! The cops were NEVER tested, breath or blood, though many witnesses testified to their drunken state. The girl had just gotten off work 10 minutes earlier and hadn't had ANYTHING to drink that evening, according to testimony of her coworkers and bosses, and yet her breathalyzer test showed she was at 0.3% blood alcohol level, or 3 times the legal limit at the time.
She was at a traffic light, waiting to make a left turn, when the light turned yellow. There was the van coming, but it should have slowed and stopped to clear the intersection. Instead, the driver of the van FLOORED it to run through the light, which was red when it entered the intersection and hit her in the side. Tire marks, vehicle damage, and eyewitness testimony showed the van must have been travelling in excess of 70 mph as it hit her car, in a 35 mph zone. Yet the cops got rides home from fellow officers, and the girl went to jail for 2 days before bail was set. She lost her license to drive. She was charged with MULTIPLE counts including speeding, reckless driving, running a red light, DUI, resisting arrest, assaulting a police officer, disorderly conduct, and failing to signal for the turn! They threatened her with consecutive prison sentences that would keep her in prison for as much as 50 years! Unless she would plead guilty to DUI , and serve 6 months in county jail. She couldn't afford a lawyer, so she agreed to plead and went to jail. But as the story unfolded and witnesses came forward, and lawyers came forward to represent her for free, the case was overturned. But she had already served her 6 months. Eventually, she sued, and won some $150,000.00 from the state hiway patrol, which we taxpayers had to pay. The cops were NEVER charged, despite the testimony of witnesses, the overwhelming evidence of THEIR reckless driving, their falsifying of test results, false official reports, and perjury when they lied under oath. NONE of them even lost their JOBS!