Maty Mauk was suspended indefinitely from the Missouri football program after a video was posted on Twitter on Monday night that allegedly showed the Missouri quarterback snorting a line of white powder.

The video is nine seconds long, and there is no authentication of when it was shot.

Football Coach Barry Odom and Athletic Director Mack Rhoades released a joint statement announcing Mauk�s suspension Monday night.

�We are currently gathering information regarding the video in question,� the statement said. �This is an issue we take very seriously and one that will not be tolerated within our program. We will take appropriate action once we have all the facts. In the interim, Maty Mauk has been indefinitely suspended from the football program.�

This marks the third time in four months that Mauk has been suspended. He was first suspended indefinitely for an unspecified violation of team rules Sept. 29, three days after the Tigers� fourth game of the season, a loss to Kentucky.

A source indicated that Mauk�s first suspension was for a failed drug test after the team suspected he had been using.

According to the Missouri athletic department�s substance-abuse screening rules, a first positive test results in no definite suspension but the athlete is subject to unannounced testing for a year after the positive result and it may result in participation in a treatment program.

A second positive test requires a minimum suspension of seven days from play and practice. A third positive results in the athlete being �dropped from the athletics program.�

He missed four games before being reinstated to the team Oct. 25 � during the team�s bye week � but was in good standing for only six days before he was suspended again Nov. 1, that time for the rest of the season.

No official reason was given for the second suspension, but an employee at the FieldHouse bar in Columbia said Mauk got into a verbal altercation at the establishment the Wednesday night after then-Coach Gary Pinkel reinstated him to the team.

�Any player that has a problem � not just Maty, anybody that has a problem here � if we feel that it�s one that counseling is needed, or what have you, we want to help our players,� Pinkel said on Nov. 4.

Odom reinstated Mauk to the team last month with the expectation that he would fulfill behavioral requirements to remain in good standing. Mauk is enrolled for the spring semester at Missouri.

�We had long talks together and understand on both sides of it. I wanted to hear really what he wanted. Did he want to be here? Did he want to get his degree? Does he want to play football?� Odom said Dec. 23. �So, those were some things that only he and I could work out and talk through. We have done that over the last few days.

�We�ve got a clear-cut way that we�re going to do things moving forward, and I hope, and at this point, Maty�s into that, as are the other quarterbacks. We�ll take it a day at a time and see where he ends up.�

Mauk, a rising senior, holds a 17-5 career record as a starting quarterback. He ranks ninth on Missouri�s career passing yards list with 4,373 and has thrown 42 touchdowns against 19 interceptions while also running for 747 yards and four scores.

He started the first four games for the Tigers last fall, completing 57 of 110 passes for 654 yards and six touchdowns against four interceptions while also running for 145 yards and a score. Mauk was expected to compete with Drew Lock, who started the final eight games of last season in his place, Eddie Printz and Marvin Zanders during spring football.

Senior linebacker Michael Scherer, who was in the same recruiting class as Mauk, defended the quarterback on Twitter on Tuesday morning after originally deleting a tweet that he said was meant to be a text message and read �honestly he�s been much better so it sucks that this got out.�

�I will say yes the video is very old, yes Maty has been doing everything he can to be a better person and yes you should look at yourself in the mirror before pointing out someone else�s problems,� Scherer tweeted. �No one is perfect. Everyone makes mistakes.�

Sophomore wideout Keyon Dilosa also tweeted that the video is two years old and that Mauk has changed.

�I just want to start by saying that what was done in the video is not right by any means, but the fact that it was brought up years later should raise questions,� Dilosa tweeted. �Maty learned his lesson and has been clean for a while now. ... Not every football player is a bad guy and I know for a fact that Maty Mauk isn�t one.�

Mauk retweeted both Dilosa and Scherer.

This story was first published online on Monday, January 25, 2016 at 11:15 p.m.