Jonas enjoys a busy and substantial criminal practice. He specialises in defending heavyweight cases across the spectrum of criminal allegations, including murder, drugs importation, money laundering, sexual offences and serious fraud.
Current instructions include cases of murder, widescale drug importation and drug dealing revealed by the Encrochat hack, and fraud.
R v P 
Successful defence of a young woman found in joint possession of a bag containing 5 kilos of cocaine and half a million pounds. The only defendant to be unanimously acquitted. Junior alone, Snaresbrook Crown Court.
R v H 
Represented a client who pleaded guilty to causing serious injury by dangerous driving, and then committed a further offence of causing death by dangerous driving whilst on bail. Following mitigation, the Judge was persuaded to only impose a sentence of 3 years’ imprisonment. The case was widely reported.
R v P 
Secured a non-custodial sentence for 14 year old boy who committed two stabbings within 10 days of each other. Junior alone, St Albans Crown Court.
R v W 
Successful defence of attempted murder where the victim was attacked with a baseball bat, resulting in severe brain injury. Led junior, Old Bailey.
R v O 
Successful defence in multi-kilo drugs conspiracy. The case involved encrochat evidence, allegations of Police misconduct, and a “drugs line” supplying many kilos of cocaine between the north and south of England. Led Junior, Kingston Crown Court.
R v P 
Successfully defendant lady accused of being “the banker” for gang who used drones to fly cannabis and spice into various prisons around London. Having heard Jonas’ cross-examination of the financial investigator, the Judge invited the prosecution to review the case against his client. The prosecution then discontinued the case against Jonas’ client. Junior alone, Blackfriars Crown Court.
R v T 
Successful defence in a gang murder trial, involving complex partial DNA evidence and glass fragment evidence. Only defendant to be acquitted. Led junior, Old Bailey.
R v T 
Multi-million pound conspiracy to defraud HMRC and money laundering, involving the fraudulent evasion of duty due on imported alcohol. Following an 8-week trial involving complicated issues of law, unanimously acquitted. Junior alone, Southwark Crown Court.
R v L 
Successfully defended a convicted murderer accused of embezzling funds from his victim’s accounts, whilst also defrauding the relevant banks. Following a successful submission of no case to answer, the Defendant was acquitted. Led junior, Guildford Crown Court.
R v W 
Appeared in notorious case involving robbery of “priceless” Chinese artefacts from the Fitzwilliam Museum in Cambridge. The case was widely reported. Led Junior, Birmingham Crown Court.
R v W 
Appeared for the defence in notorious murder trial involving a “stray bullet” shooting outside the Woody’s Grill in Kilburn. The case was widely reported. Old Bailey, led Junior.
Welwyn BC v S (Company) & GS (Director)
Advised and appeared on behalf of both a company and its director initially charged with 120 separate allegations of fire safety regulations. Following representations made to the prosecution only 13 of these allegations were proceeded with, and none of them against the Director of the company, who was granted a defence costs order having had no evidence offered against him.
R v Q
Appeared as a led junior in a 5-week conspiracy to murder and conspiracy to cause grievous bodily harm trial. Defendant was acquitted of conspiracy to murder. Following a conviction for conspiracy to cause grievous bodily harm, an appeal was lodged and the Court of Appeal quashed the guilty verdict and ordered a re-trial.
Appeared pro bono at the Coroner’s Court on behalf of a family whose child had fallen to her death from an unsecured council flat window.
Driving offences are a speciality, with Jonas frequently advising in conference and appearing at Court in order to ensure the retention of driving licences for his clients. He has an exceptional record of success in such cases.
University v M 
Successfully defended a student accused of rape within the context of a university investigation. Junior alone.
R v L 
Successfully defended ‘the Lords Groper’, accused of sexually assaulting a woman at Lords Cricket Ground, in the exclusive Pavillion area. Following a submission of no case to answer based on poor identification evidence, the District Judge dismissed the charge. The case was widely reported. Junior alone, Willesden Magistrates’ Court.