Sole proprieter DBA bussiness bank account. I just started work with him, and he scammed with fake checks and ran away. What do I do?

File a criminal complaint as well as a claim with the Texas Workforce Commission

Hire a private investigator, notify your bank, file a police report, and see if you can track the individual down. You may have claims for civil fraud, fraudulent inducement, fraud by nondisclosure, civil theft, money had and received, etc. Good luck!