Patrick Maisonneuve (born 1 March 1955) is a French lawyer of criminal law.
He began his legal practice in 1979, and is known for taking on widely reviled high-profile clients that other lawyers have shunned.
In 2013 and 2014 GQ ranked him the sixth most powerful lawyer of France.
He experienced a turning point in his career around 1990, when he joined the defense team in the COGEDIM affair (bogus invoices produced by an important building company) and the one of Henri Emmanuelli (in another affair of bogus invoices).
Patrick Maisonneuve estimated the total amount of the fake invoices to "more than 10 million euros" and called the demand of the UMP for "financial blackmail".
The criminal investigation accelerated during the following months.
In the name of his clients, Patrick Maisonneuve also filed three complaints against Le Point, who, in three different articles, had accused Bygmalion of profiting illegally (an accusation never endorsed by the investigative magistrates in charge of the case).
After Nicolas Sarkozy was formally indicted in February 2016, Patrick Maisonneuve expressed his satisfaction and reiterated his position: The bogus invoices were all about the excessive expenses of Nicolas Sarkozy's campaign.