Maurice Mattis, Hon., LLB

CEO - Senior Counsel

Mr. Mattis is aformer Crown Attorney with experience working at Guns and Gang Special Prosecution Unit in Toronto. As a Defence Counsel he has argued cases at the Ontario Court of Appeal and the Ontario Superior Court. He is also a member of the Legal Aid Serious Crime Panel.

The following are the type of cases that Maurice is currently defending:

  1. First degree murder
  2. Attempted Murder involving firearms
  3. Cases alleging firearms involved in shootings, found in cars, on the person and in houses
  4. Projects by Guns and Gang prosecutors involving allegations of trafficking in firearms and drugs
  5. Projects by Federal Prosecutors alleging involvement of persons in importation of multi kilos of drugs into Canada.
  6. Human trafficking and other allegations of pimping.
  7. Sexual Assaults allegations

Some of Maurice recent successes includes;

  1. At Superior Court having case dismissed in a Project by Federal prosecutors involving allegations that a group of persons imported multiple kilos of drugs into Canada. The case involved wiretaps and video surveillance. One of the other accuse wasconvicted andsentenced to 18 years in jail.
  2. Case dismissed at the preliminary hearing against client who was charge with possession of firearm found in a house where the police had surveillance video of client at the house.
  3. At Superior Court case dismissed against client who was charged with possession of firearm found in a car where the client was the driver.
  4. At Superior Court case dismissed where the client was charged for importing cocaine after police searched the luggage and found drugs.
  5. At Superior Court Case dismissed for client who was charged with pimping charge of recruiting a person to be a prostitute.
  6. Jury found client not guilty for aggravated assault in case where client was alleged to seriously wound another person with a large knife.
  7. Jury found client not guilty after police executed a search and allegedly found drugs in bedroom occupied by client.
  8. Jury found client not guilty for robbery with firearm where the witness for the crown alleged, they were robbed at gunpoint by the client who they knew before the incident.
  9. At Superior Court trial theJudge found client not guilty for robbery with firearm. The prosecutor presented evidence of confession, video of the robbery, still photograph of the suspects and fingerprint of the client found in the get-a-way car. Maurice successfully argued,and the judge excluded the confession, agreed that the quality of the photograph was insufficient, and the fingerprint was not very probative because we did not know when it was placed in the car.
  10. At Superior Court the judge refused to order that the client was dangerous offender or a long-term offender after Maurice challenged the evidence of the doctor who provided the report for the prosecutor.

Mr. Mattis can be reach through email at or (905) 230-8898


Nakita Kelsey, JD

Associate Managing Counsel

Nakita obtained her undergraduate degree at Carleton University in Ottawa, Canada. She achieved a Bachelor’s of Arts and graduated with Honours. Her major was law with a strong statistics background. I was accepted to Osgoode Hall Law School in Toronto.

I started my legal career with Mattis Law Professional Corporation as an Articling Student. I have a vast range of experience in conducting bail hearings, crown pre-trials, judicial pre-trials, preliminary hearings, pleas ad sentencings. I have worked on cases including: assault, aggravated assault, dangerous weapons, assault with a weapon, theft, fraud, possession on the purposes of trafficking, breach, attempted murder, murder, animal cruelty, mischief, break and enter, robbery, uttering threats, advertising sexual services, and an array of gun and drug offences. I have experience in Ontario Court of Justice, Superior Court of Justice (High Court), addictions court, mental health court, youth court, and federal court.

I became a lawyer to fight for my client’s rights. At Mattis Law Professional Corporation we bring any and all applications to ensure that our clients were dealt with in accordance with their rights. I have brought an abundance of applications including; third party record application, Rowbotham application, Charter applications, Garofoli applications, Applications to have a speedy trial, and Certiorari applications. I am always eager to take on a new case and strive for client satisfaction.

Read More

Michelle Miles

Associate Counsel

Michelle has a JD from Osgoode Hall Law School and a Honors Bachelor Degree in Political Science from University of Toronto.

During her time in law school, Michelle interned with Legal Aid Cambodia – a non profit organization dedicated to providing legal services for low income communities.

Michelle worked predominantly with women and advocated for an end to violence against women, sexual tourism and sexual assault. Michelle also summered at the Human Rights Legal Support Center in the legal department by assisting persons who faced discrimination contrary to the Ontario Human Rights Code. Before starting with Mattis Law, Michelle participated in the Feminist Advocacy Program through Osgoode Hall and volunteered with the Barbra Schlifer Commemorative Clinic. While engaging with feminist works, Michelle worked alongside survivors of domestic violence in the Family Law Division.

At Mattis Law, Michelle is an advocate in the family law department, dealing with both domestic and child protection matters at the Ontario and Superior Court of Justice. She has dealt with court applications, motions, conference(s) pursuant to the Family Law Act (FLA), Children Law Reform Act (CLRA), Divorce Act (DA) and Children Youth Family Services Act (CYFSA). Michelle is committed to assisting vulnerable communities in achieving access to justice. She decided to join Mattis Law because of its close ties with marginalized communities and their strong reputation for advocacy.

Michelle will continue to practice law from anti-oppressive lens, while challenging facets of the law that attempt to weaken or isolate communities.

Outside of work, Michelle likes to binge on Netflix, indulge in retail therapy and spend time with family and friends.

Read More


Melbourne Ellis


Danielle Caldeira

Legal Assistant

Sharell Drake

Legal Assistant