Ehtical Dilemma

A few months back,a woman joined our church.  Her and her sister lived near the church and both had a history of drugs so trying to live a Christian life is really a struggle for her.  The lady has a young son who owns a pick=up truck with huge tires.  One day someone took the truck (which has no tag) and spun wheelies all around their property, the church property, and the business property across the street. 
This incident took place during the time I was working to clear the church property and I was at the church 3 or 4 hours every day.  One day when I went over to the church property to work, I saw the sons truck sitting mired in mud, facing the church, and it was obvious that the truck was the vechicle that was used to cause the damage to the three properties. 
The owner of the business, who also happens to be the owner of the house this lady, her sister and her son lives in, dedcided to sue for property damage. 
Instead of owning up to their misdeeds, the lady and her son have chosen to deny culpability for the damage, instead to blame the incident on a visitor who just happened to get stuck in the mud after a recent rain. 
If one had seen the propery damage it would be immediately obvious that the damage was not caused accidentalily as a mud trail led from where the truck is normally parked unto the street then into the church property back through where the truck is normally parked backinto the strert, and again and again.  One one of the circles the truck veers wider, causing damage to the church property and to the propertyat the rental home.  At one point the driver of the truck spins the truck around and is abandoned.  The next day the truck is moved again causing more damage to the rental house property, the church property, and the property of the busines next door. 

If I  there is a court case and I am called as a witness, I stay to lose my assistant baseball coach and two or three members of the church.  It should have been upon the lady and her son to tell the truth and had they done so then I would have been willing to work a deal to help them pay off the $150.00 the business is seeking to repair the damage. 

But instead of telling the truth the family next door has chosen to deny any responsibility and  has chosen instead to vacate the house and place their belongings in a storage unit until they can find a place to live. 

If you were in my shoes, what would you do?