The manhunt intensified Tuesday for the “affluenza teen” who killed four people while driving drunk two years ago — as the search for him stretched into a second week.

Texas police believe Ethan Couch, 18, who skipped at least one of his probation check-ins, may have left town — or even the country — with his mother, causing a judge to issue a “directive to apprehend,” which is similar to a warrant, on Dec. 11.

Hundreds of tips have been called in over the last 11 days, but Tarrant County Sheriff Dee Anderson said they could be a “double-edged sword” because many will likely not lead to Couch.

Still, District Attorney Sharen Wilson said, “Every lead is being investigated.”

His mother, Tonya, was declared a missing person as of Sunday — and authorities believe they could be using her pickup truck as a getaway vehicle.

“We believe she is helping or assisting him, but we can’t even prove they are together at this time,” Anderson said.

The FBI is assisting local authorities and the US Marshals Service in the investigation, and authorities announced a cash reward of $5,000 and issued a wanted poster to help find him.

In 2013, Couch was convicted of four counts of intoxication manslaughter.

But instead of serving jail time, a judge infamously gave him 10 years of probation — after his lawyer successfully argued that Couch’s wealthy upbringing meant he needed rehab instead of prison.

Video: You won’t believe what this little bastard did after killing 4 in a DUI

With Post wires