With the power of a viral social media post, the Dartmouth Police Department was able to track down a sex offender accused of failing to register with the state.

On December 3, officers took to Facebook and posted the “Dartmouth Police Department’s Christmas wish list.” At the top of list: the location of Brad Santos, a Level 3 sex offender with two active warrants for allegedly failing to register as a sex offender.

”[W]e all felt as if there would be no better way to celebrate the holiday season, than to have him visit with us one more time,” the post read.

The post received 190 shares and more than 200 reactions and comments. And it appears the attention paid off. By December 4, Santos had turned himself in, a follow-up Facebook post read. The department credited the viral Facebook post with leading to his decision to turn himself in.

The department has used social media to track down Santos several times. In October, the department arrested Santos for two warrants for allegedly failing to register as a Level 3 sex offender in Massachusetts after learning he was at a local motel. He turned himself in on similar charges in September.

His entry in the Massachusetts Sex Offender Registry Board’s database states he was convicted of indecent assault and battery on a person aged 14 or older in 1997.