Operator stopped by NH police for speeding violation. Open containers are found at the feet of the passenger and police allege driver displayed odor of alcohol, slurred speech and poor balance and coordination during field sobriety tests. Defense challenges validity of field sobriety in light of driver’s physical disabilities and serious medical conditions, including recent knee surgery. Evidence of breath test refusal countered by driver’s willingness to take blood test which police will not allow. Not guilty verdict in this NH DWI case following trial.