The more I look, the more I find - although the early ones could be another John, who kept a beer house in Bute St
August 1863 - John and Michael O'Brian find 5 shilings for being drunk and riotous
august 1866 - Ellen O'Brian and Julia Hayes were fined 2s. 6d. each and costs; and John O'Brian, Michael Hayes, and Thomas and Mary Welch were fined 5s. each and costs, for being drunk and riotous at Roath.
August 1868 - drunk and riotous in Evelyn st
May 1870 - Michael, John and Mary O'Brian convicted of assaulting Catherine Smith in Roath. 14 days
Feb 1873 - 1 month with hard labour for assaulting the barmaid at the Barley Mow, Bute St, who refused to serve him when he was drunk. Had just come out of prison for assaulting a young woman
March 1873 - drunk in Tyndall St and assaults a policeman. 6 months hard labour
November 1874 - young irish labourer. 2 months hard labour for assaulting a policeman when drunk (having only just got out of prison for a similar offence)
July 1876 - assault on a police officer. Unsure of this one as he's described as a militiaman
March 1877 - Irish labourer of Bute Street. Assaulted a police officer who was conveying a companion of his to the station. Sentenced to 2 months hard labour
or
March 1877 - 12 months for assaulting Cornelius Driscoll (as JOhn O'Brien)
March 1884 - Mary Jane Martin and John O'Brien were charged with assaulting William Lake. He got one month's hard labour
May 1885 - Thomas M'Connell, John O'Brien, and John Donovan were charged with assaulting Police-Constable Gasken....Inspector Cox gave the defendants bad characters. All had been concerned in beating a police-officer about six weeks since. A resident of the neighbourhood also said that defendants were a perfect terror to the neighbourhood, insulting him and everyone else, driving business away from his shop, as people were afraid to come
Oct 1887 - John O'Brien, John Sullivan, William Thomas, and Thomas Collins were charged with stealing a purse containing £22 from the person of Frederick Schultz, with violence, at the East Wharf
Nov 1889 - John O'Brien and Mary Ann O'Brien, alias Meehan," his wife, were charged with keeping a brothel at 19, Sandon-place. he was convicted and given 2 months