Mo van Barr

Mo van Barr is a character in Red Dead Redemption.

John Marston has a choice to kill or capture him to obtain the Deadly Assassin Outfit Scrap.

His bounty poster is on the South side of the Southwestern Railroad Company building in Armadillo. He is a part of Walton's Gang.

He is seen wearing a top hat and uses a repeater rifle as his main weapon.

Bounty $160 Alive $60 Dead

Known issues
The "Mo van Barr" glitch is a huge obstacle to people tryng to get their pre-order bonus of the Deadly Assassin outfit. One of the requirements to unlock this outfit is to find and capture/kill Mo van Barr. For some gamers Van Barr isn't showing up in the wanted posters, though you can keep collecting bounties and it might be possiable you can get him later but won't be able to tell from the poster that it's him; not sure though, for others he escaped during the wanted mission never to re-appear for the rest of the game. While others downloaded the Deadly Assassin outfit after killing Mo Van Barr, therefore "putting the cart before the horse" and killing the target before he was eligible to be killed for the outfit. Another known issue is when you finally get him to appear, and you manage to catch him (or kill him) and you get no assassin scrap.

RockstarSupport posted at IGN that the designers are working on a patch that fixes this issue.

A downloadable patch was created which made Mo Van Barr appear, however killing or capturing him did not update the outfit check on the list.

As of June 3 Rockstar announced that they are working on another patch that will solve the Mo Van Barr glitch as well as multiplayer connectivity issues, which should be released by June 12.

Possible Solutions
For those gamers that are unable to get Mo van Barr to show up in wanted posters, players have noticed they can spawn Mo van Barr by starting a new game. Complete Bonnie's missions up through Wild Horses, Tamed Passions. Make a save and initiate Marshall Johnson's first quest: Political Realities in Armadillo. In this mission you must capture or kill Walton, kill him. When you get back to town, Mo van Barr's bounty may be the first one posted. Leaving Walton alive seems to prevent Mo van Barr's bounty from showing.

Alternatively, you can start Marshall Johnson's first mission anytime without completing all of Bonnie's missions. All you need to do is complete Bonnie's second mission (the race) to get the Marshall's first mission. Then, initiate Political Realities in Armadillo and kill Walton.

Trivia

 * Mo's moustache is designed in the likeness of the winner of Rockstar Games' Movember competition. mo's name displayed as one word is movanbarr if said quickly it sound suspicously like rockstar games movember which is were mo's moustache design came from