The word goes, pics or it didn’t happen … and in Tekashi 6ix9ine’s case, the feds say they have all they have to prove his involvement in multiple crimes.

Federal prosecutors filed documents, obtained by TMZ, such as greater than a dozen images of Tekashi 6ix9ine, his ex-manager Kifano “Shotti” Jordan A.K.A Tr3way and other crew members pulling armed robberies and shootings. The data appears to have him dead to rights.

Based on the docs, cops grabbed videos from phones owned by 6ix9ine or crew members and matched them with surveillance videos of an April 3 armed robbery in Brooklyn. They say the images prove Shotti pulled the robbery, and cops believe Tekashi 6ix9ine watched from the street and recorded video.

There’s a screen grab from that video, which prosecutors think Tekashi gave to a third party to post on the Internet. Included also … matching shots of a backpack that was stolen, and later found in Tekashi’s home during a Sept. raid. That raid also resulted in an AR-15 rifle.

Click on through the gallery … you can observe cops also matched images of 6ix9ine from 2 Brooklyn shootings on April 21. TMZ first reported Tr3way’s alleged involvement in those incidents.

Prosecutors filed these images as proof Tekashi ought to be held without bail. In the docs, they explain he’s a flight risk because he frequently takes “just as much as $100,000 in one bank withdrawal.”

They made their point. Tekashi’s still sitting in a federal facility … without bail.

His lawyer, Lance Lazzaro says, “Daniel Hernandez is innocent and was never part of a criminal enterprise. He shouldn’t have been indicted.”