Police who raided a house in Salsburgh discovered heroin inside worth £5000.
The find led to a father and his two sons facing drugs charges at Airdrie Sheriff Court this week.
Stephen Jones senior, 54, admitted being concerned in the supply of heroin at his son Stephen's home on Forrest Road.
Stephen Jones junior, 30, and Lee Jones, 22, of Mavisbank Street, Airdrie, faced the same charge, but had their not guilty pleas accepted.
Liam Haggart, prosecuting, said police officers recovered the drugs after going to the house with a search warrant on October 23, 2019.
Stephen Jones junior admitted being in possession of cannabis worth £200 that day.
The court heard that Jones senior, of White Street, Partick, has a previous conviction for being concerned in the supply of drugs. That resulted in a 28-month jail sentence.
Sheriff David Young deferred sentence on him until next month for a criminal justice social work report. He will also be assessed for an electronic tagging order.
The sheriff told Jones: "You should not take it from this that there will not be a custodial sentence.
"I don't want you to get your hopes up, but I'll allow your bail to continue meantime."
Stephen Jones junior's solicitor said he had been consuming "a lot of cannabis" in 2019 but stressed: "He has cut down his use dramatically and no longer sees it as an issue."
Sheriff Young fined him £315.
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