Fifteen Counts, Nine Counts and Nineteen Counts Out of a Single Bowmanville House: Durham’s Drug Enforcement Unit and the Provincial Cannabis Team Charge Dennis Grant, 46, Ashley Oswald, 40, and Jennifer Thomsen, 57 (August 25, 2026)
Nine different substances came out of one Bowmanville address, and the charge sheet Durham Regional Police published on Tuesday, August 25, 2026 is the kind that gets written when investigators believe they have found a menu rather than a stash. Forty-three counts across three accused, eight of them trafficking counts alleging actual sales rather than possession.
On Friday, August 21, 2026, members of the Durham Regional Police Drug Enforcement Unit, assisted by the Provincial Joint Forces Cannabis Enforcement Team, concluded a drug trafficking investigation and executed a search warrant at a residence in Bowmanville. The force says a large quantity of drugs was located and seized.
The Menu
Durham lists the seizure as Adderall, Percocet, cocaine, ecstasy, MDMA, GHB, mushrooms and cannabis. The charges add MDA and psilocybin as separately itemised substances, bringing the catalogue in the charge sheet to nine.
What the force does not do is put a number beside any of them. There is no weight for the cocaine, no tablet count for the Adderall or the Percocet, no volume for the GHB, and no dollar figure attached to anything. “A large quantity” is the whole of the quantitative record.
That is a meaningful omission in a file of this size. The breadth of the inventory — stimulants, opioids, a party-drug tier, a dissociative, psilocybin and cannabis — is what distinguishes this warrant from a single-commodity bust. A house holding nine substances is a house serving several different customer bases at once.
Why the Cannabis Team Was There
The Provincial Joint Forces Cannabis Enforcement Team is not a routine assist on a residential drug warrant. Its presence, and the cannabis-for-the-purpose-of-selling counts laid against all three accused, indicate investigators were treating the cannabis component as a commercial illicit operation rather than an incidental quantity of a legal substance.
Durham does not say what triggered PJFCET involvement, whether the team brought the file to the Drug Enforcement Unit or the other way round, or whether the cannabis was cultivated, purchased or diverted.
The Bowmanville-Oshawa Discrepancy
The release Durham published carries the headline “Male Arrested Following Drug Investigation in Oshawa” and opens by describing a Drug Enforcement Unit investigation in Oshawa. The body of the same release then places the search warrant at a residence in Bowmanville, roughly twenty kilometres east, in the Municipality of Clarington.
The most straightforward reading is that the trafficking investigation ran in Oshawa and the warrant landed on a Bowmanville supply address — a pattern common enough in Durham files. But the force does not reconcile the two, and neither of the three accused is listed as an Oshawa resident. Grant is of Clarington; Oswald and Thomsen are both of Whitby. Nobody charged lives in either of the two municipalities named in the release.
The Charge Sheet, as Durham Regional Police Worded It
- Dennis Osaka Grant, 46, of Clarington — fifteen counts. Traffic in a Schedule I substance (cocaine) x2; traffic in a Schedule I substance (MDMA); traffic in a Schedule I substance (Percocet) x2; traffic in a Schedule I substance (Adderall); possess cannabis for the purpose of selling; possession for the purpose of trafficking in Adderall, Percocet, cocaine, ecstasy, MDMA, GHB and MDA; possess a Schedule III substance for the purpose of trafficking (psilocybin).
- Ashley Oswald, 40, of Whitby — nine counts. Possess cannabis for the purpose of selling; possession for the purpose of trafficking in Adderall, Percocet, cocaine, ecstasy, MDMA, GHB and MDA; possess a Schedule III substance for the purpose of trafficking (psilocybin).
- Jennifer Thomsen, 57, of Whitby — nineteen counts. Possess cannabis for the purpose of selling; possession of a Schedule I substance for the purpose of trafficking x8; possession of another controlled substance for the purpose of trafficking x2; traffic in a Schedule I substance (cocaine) x3; traffic in a Schedule I substance (MDMA) x2; traffic in another Schedule III substance (psilocybin); possess proceeds obtained by crime under $5,000; traffic in a Schedule I substance (opioid).
- Grant and Thomsen were held for a bail hearing.
- Oswald was released on an undertaking.
- Tips directed to the Drug Enforcement Unit at 1-888-579-1520 ext. 5800.
How the Bowmanville File Ran
What Is Not in the Record
There is no address. There is no quantity for any substance. There is no currency figure, even though a proceeds-of-crime count under $5,000 was laid against Thomsen — a count that by definition rests on a valuation investigators have made and not disclosed.
There is no firearm and no weapon of any kind. There is no explanation of the relationship between the three accused, no statement of who lived at the searched residence, and no indication whether any of them was bound by a court order at the time. There are no court dates, and no bail outcome for Grant or Thomsen.
There is also no explanation of the charge asymmetry. Grant and Thomsen both face trafficking counts alleging sales; Oswald faces none, only possession-for-the-purpose counts, and she alone was released on an undertaking. Thomsen, the oldest of the three at 57, carries the heaviest sheet.
Where This File Stands
Verified. The August 25, 2026 publication date; the August 21, 2026 warrant date; that the Drug Enforcement Unit ran the investigation with the assistance of the Provincial Joint Forces Cannabis Enforcement Team; that the warrant was executed at a residence in Bowmanville; the list of substances seized; the names, ages and municipalities of all three accused; every count as worded by the force; and the custody dispositions. The Oshawa-Bowmanville discrepancy is reproduced from the release itself. Source opened and read in full on the Durham Regional Police newsroom.
Missing. The address. Every quantity. The currency amount underlying the proceeds count. The relationship between the three accused. Who resided at the searched premises. Court dates and bail outcomes. Why the release names Oshawa in its headline and Bowmanville in its body.
Not claimed. That any gang, syndicate or organization stands behind this operation. Durham names none, and none is asserted here. Nor is it asserted that the accused are connected to one another beyond appearing on the same charge sheet from the same warrant.
Update trigger. Any quantity disclosure. Bail outcomes for Grant and Thomsen. Any further accused. Any statement clarifying the Oshawa-Bowmanville geography or tying the address to a wider supply file.
Primary Sources
- Durham Regional Police Service media release: “Male Arrested Following Drug Investigation in Oshawa” — dated August 25, 2026, filed under Media Releases. Opened and read in full. Sole source for the warrant date, the Bowmanville location, the assistance of the Provincial Joint Forces Cannabis Enforcement Team, the list of substances seized, the names, ages and municipalities of the three accused, the full charge wording, and the custody dispositions.