"I was really, really disappointed. It was not a good Easter Sunday." It appeared a group of people had jumped all over the car.
"They have obviously jumped on the roof, caved it in, and jumped on the windshield and shattered that."
She said the vehicle, which was being parked temporarily outside her house, had probably been caught in the path of revellers from the Facebook party as they dispersed.
"I'd say we've fallen victim from the party being broken up and people moving on."
The charity would be hard hit by the cost of repairing the car, and the damage had also interfered with plans for an upcoming conference.
"We have to pay $500 in excess to get it fixed. That's money coming away from the very important activities we're doing with thousands of volunteers.
"The car is also needed for our North Island conference, which is in Napier next week.
"It couldn't have come at a worse time." SADD is a nationwide charity which aims to promote young driver safety.
Meanwhile, Georges Rd resident Corena Hodgson said she witnessed "a number of fights" on Latham St on the night of the party. She said she had returned home from a photography job at a wedding about 11.30pm on Saturday when she heard police talking over loudspeakers, asking a crowd to move back.
She saw scattered fights break out and a large group of young people refusing to move for police, while residents looked on in their dressing gowns and pyjamas.
"My partner saw a bottle being hit on someone's head."
Senior Sergeant Ross Smith of the Eastern District Command Centre said police could not prevent another Facebook party from happening, but would monitor the situation if one did occur.
"There's no law against having a party.
"Obviously we don't want that to happen again and the residents don't either."
-To make a donation to help pay for the repairs to the SADD car, visit: http://givealittle.co.nz/cause/saddcarhelp
