WPF How to bind to ICommand in the ViewModel from inside a ListView GridView? [duplicate]

I have a WPF application using MVVM. I have a view with a View Model as its DataContext. Inside the View, I have a ListView binding to an observable collection. On each row of the ListView, I have a button that I want to bind to an ICommand in the DataContext. How do I set the RelativeSource to get to the DataContext ICommand?

xaml

<ListView ItemsSource="{Binding Services}"><ListView.View><GridView><GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" /><GridViewColumn Header="Frequency" DisplayMemberBinding="{Binding Frequency}" /><GridViewColumn Header="Type" DisplayMemberBinding="{Binding Type}" /><GridViewColumn Header="Enable State" DisplayMemberBinding="{Binding EnableState}" /><GridViewColumn Header="" ><GridViewColumn.CellTemplate><DataTemplate><Button Background="Transparent" BorderThickness="0" Command="{Binding RemoveTimerClick}" CommandParameter="{Binding}"><Image Source="pack://application:,,,/Resources/Images/Delete.png" Width="20"/></Button></DataTemplate></GridViewColumn.CellTemplate></GridViewColumn></GridView></ListView.View></ListView>

This Command binding is looking for a the ICommand in the Services. I tried

Command="{Binding RemoveTimerClick, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}"

But this didn't work because it is binding to the UserControl (which is the View), not the DataContext (which is the View model). How do I bind to the DataContext that also contains the Services collection?