Fast & Furious "caught top suspect, then let him go"

Apparently, the BATF didn't even catch their targets when they had the evidence on them in the US. From the LA Times:

Seven months after federal agents began the ill-fated Fast and Furious gun-tracking operation, they stumbled upon their main suspect in a remote Arizona outpost on the Mexican border, driving an old BMW with 74 rounds of ammunition and nine cellphones hidden inside.

Detained for questioning that day in May 2010, Manuel Fabian Celis-Acosta described to agents from theBureau of Alcohol, Tobacco, Firearms and Explosiveshis close association with a top Mexican drug cartel member, according to documents obtained this weekend by the Times/Tribune Washington Bureau.

The top Fast and Furious investigator, Special Agent Hope MacAllister, scribbled her phone number on a $10 bill after he pledged to cooperate and keep in touch with investigators.

Then Celis-Acosta disappeared into Mexico. He never called.

Had they arrested him red-handed trying to smuggle ammunition into Mexico, Fast and Furious might have ended quickly. Instead, the program dragged on for another eight months, spiraling out of control. . . .

Celis-Acosta continued slipping back and forth across the border, authorities say, illegally purchasing more U.S. weapons and financing others. He was not arrested until February 2011, a month after Fast and Furious closed down. . . .

Why ATF agents did not arrest Celis-Acosta immediately is not clear. He was their prime suspect and the subject of secret wiretaps approved by the Justice Department. . . .