function Find-ChildProcess {
    param($ID=$PID)

    $CustomColumnID = @{
    Name = 'Id'
    Expression = { [Int[]]$_.ProcessID }
    }

    $result = Get-WmiObject -Class Win32_Process -Filter "ParentProcessID=$ID" | Select-Object -Property ProcessName, $CustomColumnID, CommandLine

    $result
    $result | Where-Object { $_.ID -ne $null } | ForEach-Object {
        Find-ChildProcess -id $_.Id
    }
}

$procid=get-process salt-minion |select -expand id

Find-ChildProcess $procid | Stop-Process -Force