(NewsNation) — A father whose son disappeared in 2021 is now running for Congress in hopes of helping those who are searching for missing loved ones.

David Robinson is running in his home state of South Carolina and is campaigning in part to improve the process of searching for missing persons.

Daniel Robinson was working in a remote part of Arizona when he disappeared. The 24-year-old’s Jeep was found crashed in a ravine with his cell phone, wallet and keys inside. Police said there was no evidence of foul play though the family continued to call for a deeper investigation.

Police records show Robinson had been rejected by a woman shortly before his disappearance. He had met her while delivering for InstaCart and based on text messages, had shown up to her home uninvited multiple times even after she asked him to leave her alone.

His family maintains that he was not suicidal in the days leading up to his disappearance and David Robinson said he believes his son is still out there.

An Army veteran, David Robinson is campaigning for changes like making it easier for families and law enforcement to access a missing person’s technology, since time is of the essence in missing cases. He has pointed to his military experience, suggesting that if the government can find a terrorist like Osama bin Laden, they should be able to locate missing people in the U.S.

Robinson is also campaigning on other issues, including infrastructure updates. In addition to his bid for office, he continues to return to Arizona to press law enforcement and search for his son.