Me Marie-Soleil Tanguay
Lawyer
Me Marie-Soleil Tanguay joined the CSG Avocats team in 2024, bringing exceptional experience gained during her articling at a major criminal law firm in Montreal. A graduate of the University of Ottawa’s Faculty of Law (2023), she also completed a year of undergraduate studies in criminology. She was admitted to the Québec Bar and officially graduated in 2024.
Her path is marked by a constant commitment to justice and access to rights. Me Tanguay has gained extensive experience and in-depth knowledge of criminal law through several clinical trainings. She has worked with legal aid in criminal and youth matters, as well as at CSG Avocats and the Directeur des poursuites criminelles et pénales (DPCP). This background has allowed her to develop a comprehensive understanding of the various spheres of criminal law, enriching her practical expertise and strategic thinking. Having experience on both the defence and prosecution sides gives Me Tanguay a major advantage that sharpens her analysis and approach in criminal cases.
Today, Me Tanguay brings her diverse experience and passion for justice to serve her clients, combining rigor, empathy, and solid expertise in criminal and penal law.
Region of practice
Areas of expertise
Me Tanguay handles a wide range of criminal law cases, including sexual assault, domestic violence (assault, threats, harassment), impaired driving, theft, drug-related offenses, breaches of conditions, and criminal negligence. She also appears before the Youth Division, where she represents minors charged with various criminal offenses.
Regardless of the area of law, Me Tanguay provides rigorous and effective defense for her clients, supporting them through every step of their legal process, no matter the stakes. Me Marie-Soleil Tanguay also handles all types of offense-related matters, regardless of their nature. Her in-depth knowledge of the applicable laws allows her to develop effective strategies to challenge or mitigate the consequences of such offenses.
Involvements
- Barreau de l’Outaouais
- Criminal and Correctional Law Association of the University of Ottawa
Distinctions
Recent successes
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Serious Charges and Acquittal
In a case involving serious charges, including possession of a prohibited weapon, break and enter, and sexual assault, thorough preparation and rigorous cross-examination helped expose significant inconsistencies and weaknesses in the prosecution’s evidence. -
Breach of Probation and Acquittal
In a case where the client was facing a charge of breach of probation, Me Tanguay successfully obtained an acquittal before the trial had even begun. By identifying significant weaknesses in the prosecution’s evidence and difficulties in proving the essential elements of the offence, she demonstrated to the Crown that the evidence could not support a finding of guilt. -
Release in an Intimate Partner Violence Case
In a case where the client was detained on several charges, including three alleged breaches of conditions, assault, and assault by strangulation in an intimate partner violence context, Me Tanguay represented the client at the bail hearing. Despite the serious nature of the allegations and the alleged breaches, her representations before the Court resulted in the client being released pending the continuation of the proceedings. -
Withdrawal of a Ticket Following an Accident
In a case where the client received a ticket after being accused of causing an accident by making a right turn on a red light without yielding the right of way, Me Tanguay successfully obtained the complete withdrawal of the ticket.
Following discussions with the prosecution and arguments highlighting weaknesses in the evidence, the ticket was withdrawn before a trial was even necessary.
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Hit and Run
In a penal matter where the client faced a ticket for a hit and run, Me Tanguay successfully obtained the withdrawal of the ticket. She demonstrated that the client’s rights had not been respected during the police intervention and that the evidence was insufficient.
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Impaired Driving and Withdrawal of Charges
In an impaired driving case, Me Tanguay successfully obtained the complete withdrawal of the charges against her client. She demonstrated that the police had no lawful grounds to justify the vehicle stop, which led to the abandonment of the proceedings. -
Release from custody
In criminal cases where the client was arrested for harassment and failing to comply with a promise, Me Tanguay secured the client’s release despite multiple pending matters. A few days later, when the client was arrested again for harassment, death threats, and failing to comply, Me Tanguay once again, after tough negotiations with the Crown prosecutor, succeeded in obtaining her client’s release while awaiting trial. -
“Car Surfing”
In a penal case where the client was charged with “car surfing” and risked losing 12 demerit points and paying a $1,500 fine, the arguments advanced by Me Tanguay led to a settlement in which the client lost no demerit points and only had to pay a $120 fine. This outcome saved the client’s driver’s license. -
Sentencing
In a criminal case where the client sought to negotiate a sentence, Me Tanguay managed to secure an even more lenient sentence than expected. Thanks to her advocacy, the client avoided harsher consequences.