Well, this is the sort of nightmare scenario for NFL teams who inevitably say: “We did our homework.”

Not talking about the Los Angeles Rams here. They needed a quarterback and they took Jared Goff of Cal with the first pick in the draft — the safer (and perhaps duller) choice between Goff and the Division I-AA standout QB Carson Wentz, who went second to the Philadelphia Eagles.

No, we are looking at the pick the Miami Dolphins made with the 13th selection, Mississippi tackle Laremy Tunsil. A player the Dolphins say they had vetted thoroughly but also a guy they say they never thought would be available when they picked.

So, what are the flashing red lights of the Tunsil choice?

–Before the draft, a video was posted on Tunsil’s Twitter account which shows him “wearing a gas mask and smoking a substance from a bong”. That precipitated a fall from perhaps the No. 3 pick in the draft, to the Dolphins at 13.

Draft cognoscenti had suggested Tunsil might be taken with a very high pick, perhaps even the top pick, before the quarterback-needy Rams got the top spot. The Dolphins said Tunsil was No. 2 on their board. Presumably, several NFL teams made a quick decision to stay away from Tunsil, as he drifted down to No. 13.

Also, his pre-draft bio (linked, above) notes that he was charged with domestic assault and was suspended seven games last college season for “impermissible benefits”.

–After he was picked by the Dolphins, an image went up on Tunsil’s Instagram account “showing a text message conversation, allegedly between Mississippi assistant athletic director John Miller and Tunsil, about paying rent and electric bills for Tunsil’s mother”. Payments of that sort would be an NCAA violation on the part of the school.

–During a press conference in Chicago, where the draft was held, Tunsil conceded to reporters that he had taken money from Mississippi. Asked directly if he had taken money from a coach, Tunsil said, “I’d have to say yeah.”

So let’s recap. The Dolphins drafted a player not bright enough, during his college career, to avoid starring in a video in which it appears as if he is getting high … someone was privy to a voice mail seeming to suggest the Mississippi athletic department was paying Tunsil … and then he said at a presser that, yes, that was the case — which ought to bring the NCAA down on Old Miss like a ton of bricks.

The Dolphins, perhaps not moving quickly enough to limit the damage, saw Tunsil go to the press conference and make the “getting paid” statement.

As reporters began to zero in on that, asking Tunsil if he had been interviewed by the NCAA, a Dolphins public relations official came from behind a curtain, moving briskly, and announced that Tunsil would have no more comments — about three-and-a-half minutes into his NFL career, which might be some sort of record.

Tunsil blamed the Twitter and Instagram posts on a “hacker”. His agent said it was awful that someone would post those things on the night of the draft.

Thus, the Dolphins may have a guy with the physical ability to play tackle in the NFL at a very high level, but also one who now will have to defend himself on his history with recreational drugs (“never failed a test”) and just how dirty the Mississippi football program might be — at least when it comes to Old Miss’s most highly regarded player.

Of the topics broached in those social-media accounts, Tunsil said: “I made a mistake. A huge mistake. You know, things happen. I can’t control things.

“It wasn’t my fault.”

Hmm. The Dolphins will not be allowed to get away with the same sort of “no fault” statement — not when they are about to commit millions of dollars to a rookie whose welcome to the NFL now comes under a cloud of Johnny Manziel proportions.

They can say as often as they want that they knew chapter and verse what they were getting with Tunsil (whose bong video was made “years ago”, his Mississippi coach said), but when a team believes it has no shot to draft a guy, it would seem infinitely more likely they are not going to examine him as closely as teams holding the Nos. 3-4-5-6-7 picks in the first round.

A draft-night train wreck.