Associated Press reports:
When Officer Darryll Dowell of the Nampa Police Department is on patrol, he will pull up at a stoplight and start casing the vehicle next to him. Nowadays, his eyes will also focus on the driver’s arms, searching for a plump, bouncy vein.
[…]
The thought stems from training he and a select cadre of officers in Idaho and Texas have received in recent months in drawing blood from people suspected of driving under the influence of drugs or alcohol. The aim of the federal program is to determine if drawing blood by law-enforcement officers can be an effective tool against drunken drivers and aid in their prosecution.
If the results seem promising after a year or two, the National Highway Traffic Safety Administration will encourage law-enforcement officers nationwide to undergo similar training.
Read more in The New York Times