Current timestamp: 09/06/2026 02:39:42
AgeAlertAnonymousAppealsApplicationsApply Or RegisterArea OutlineArrow DownArrow LeftArrow RightArrow UpAutomatic DoorsBack ArrowBusinessCalendarCashArrow DownArrow LeftArrow RightArrow Down[Missing text '/SvgIcons/Symbols/Titles/icon-chrome' for 'English (United Kingdom)']ClockCloseContactDirectionsDocumentDownloadDrawDrugExpandExternal LinkFacebookFb CommentFb LikeFiletype DefaultFiletype DocFiletype PdfFiletype PptFiletype XlsFinance[Missing text '/SvgIcons/Symbols/Titles/icon-firefox' for 'English (United Kingdom)']First AidFlickrFraudGive FeedbackGlobeGuide DogHealthHearing ImpairedInduction LoopInfoInstagramIntercom[Missing text '/SvgIcons/Symbols/Titles/icon-internet-explorer' for 'English (United Kingdom)']LaptopLiftLinkedinLocal Activity[Missing text '/SvgIcons/Symbols/Titles/icon-location' for 'English (United Kingdom)']LoudspeakerLow CounterMailMapMap PinMembershipMenuMenu 2[Missing text '/SvgIcons/Symbols/Titles/icon-microsoft-edge' for 'English (United Kingdom)']Missing PeopleMobility ImpairmentNationalityNorth PointerOne Mile RadiusOverviewPagesPaper PlaneParkingPdfPhonePinterestPlayPushchairRefreshReportRequestRestart[Missing text '/SvgIcons/Symbols/Titles/icon-rotate-clockwise' for 'English (United Kingdom)']Rss[Missing text '/SvgIcons/Symbols/Titles/icon-safari' for 'English (United Kingdom)']SearchShareSign LanguageSnapchatStart AgainStatsStats And Prevention AdviceStopSubscribeTargetTattosTell Us AboutTickTumblrTwenty Four HoursTwitter LikeTwitter ReplyTwitter RetweetUploadVisually ImpairedWhatsappWheelchairWheelchair AssistedWheelchair ParkingWheelchair RampWheelchair WcYoutubeZoom InZoom Out

Leave this site

Cookies

We use some essential cookies to make our website work. We’d like to set additional cookies so we can remember your preferences and understand how you use our site.

You can manage your preferences and cookie settings at any time by clicking on “Customise Cookies” below. For more information on how we use cookies, please see our Cookies notice.

Accept cookies Reject cookies Customise cookies

Your cookie preferences have been saved. You can update your cookie settings at any time on the cookies page.

Your cookie preferences have been saved. You can update your cookie settings at any time on the cookies page.

Sorry, there was a technical problem. Please try again.

Skip to main content

Skip to main navigation

Welcome

This site is a beta, which means it's a work in progress and we'll be adding more to it over the next few weeks. Your feedback helps us make things better, so please let us know what you think.

Show me the site

South Wales Police force crest / Arwyddlun Heddlu De Cymru

  • Back to Report

    • Crime
    • Domestic abuse
    • Rape, sexual assault and other sexual offences
    • Road traffic incident
    • Report antisocial behaviour
    • Report a missing person
    • Fraud, bribery or corruption
    • Spiking
    • Stalking or harassment
    • Lost or found property
    • Lost or stolen vehicles
    • Hate crime
  • Back to Tell us about

    • How to tell us about possible terrorist activity
    • An existing case or report
    • A procession, protest or event you are planning
    • Filming
    • Contact us to report a crime, incident or suspicion
    • Contact us about something else
  • Back to Apply or register

    • Careers and volunteering
    • Charity collection licences
    • Compensation for victims of crime
    • Firearm, shotgun or explosives certificate
    • Attend a misconduct hearing
  • Back to Request

    • A collision report
    • Compensation for something the police have done
    • Your fingerprints
    • Information: about the police, about yourself or someone else
  • Back to Thanks and complaints

    • Feedback about the website
    • Complaints
    • Say thanks
  • Your area

Plain clothes officers arrest city centre drug dealer

Main article content

Cardiff/Vale of Glamorgan Featured
Published: 08:53 23/01/2026
Callum Mayer and Lucas Williams.jpg
Callum Mayer and Lucas Williams

 

Two men from Trowbridge have been jailed for their involvement in the supply of heroin and crack cocaine in Cardiff city centre.

Drugs runner Lucus Williams, 21, was seen by plain-clothes officer dealing drugs in the city centre in November last year.

When he was arrested in Queen Street, he was found in possession of more than 100 wraps of heroin and crack cocaine, £370 cash and multiple drugs lines (mobile phones).

66 wraps of crack cocaine and 48 wraps of heroin.jpg
66 wraps of crack cocaine and 48 wraps of heroin.

 

Further enquiries around Williams, led officers to 19-year-old Callum Mayer who, when arrested a few weeks later, was found with a drugs line and an illegal Rambo style knife.

The investigation revealed that Mayer was linked to nine drugs lines in total.

Mayer pleaded guilty to being concerned in the supply of heroin, being concerned in the supply of crack cocaine, and possession of a knife.

He was sentenced at Cardiff Crown Court on January 15 to 3 years and 4 months in a young offender institution.

Williams pleaded guilty to possession with intent to supply crack cocaine. possession with intent to supply heroin, being concerned in the supply of crack cocaine, being concerned in the supply of heroin, possessing criminal property, and possession of a knife.

He was sentenced at Cardiff Crown Court on January 9 to 2 years and 8 months in prison.

Officer in the case, Detective Constable Daniel Davies, from South Wales Police, said: “Drug dealers live a life on the run looking over their shoulder. We know who they are and officers are out looking for them day and night.

“We will not tolerate drugs in our communities.

“We act upon the information provided to us by the public, so please keep it coming and continue to work with us.”

  • Live Chat https://www.south-wales.police.uk/
  • Report online https://www.south-wales.police.uk/ro/report
  • 101

Always call 999 in an emergency.

Share

Footer navigation

South Wales Police

  • Contact us
  • Find a police station
  • Careers
  • About us
  • News
  • Campaigns
  • Privacy Notice
  • Terms and conditions
  • Cookies
  • Accessibility

Information and services

  • Advice and information
  • Crime prevention advice
  • Stats and data
  • Accessing information (FOI)
  • Report
  • Tell us about
  • Apply or register
  • Request
  • Feedback

Partners

  • Partner services
  • Police and Crime Commissioner
  • Police.uk
  • Ask the Police

Language

  • Cymraeg

Follow us on

© Copyright 2026. All rights reserved.