The Plano Police Department issued an alert on Thursday morning about an endangered missing person. Here’s what to do if you know the whereabouts of 17-year-old Todd “Chance” Lee.

PPD posted a bulletin to its social media asking the public for help. According to the post, Lee was reported missing from his residence in the 5000 block of K Avenue by his father. He was last seen by his family on the morning of Feb. 15.

According to the police, Chance has “previously exhibited signs of mental illness and is prescribed medication but currently does not have the medication with him.”

Due to those factors, Chance is currently classified as a high-risk (endangered) missing person. The family believes Chance may be in Louisiana.

Anyone with information about Chance’s whereabouts should call 9-1-1 immediately and reference Plano Police incident #26-31519. The department’s non-emergency line is 971-424-5678. Call the tip line at 972-941-2148 or text tip411 (847411).

Earlier this month, the department sought help in finding a 16-year-old resident of Plano, Slade Williams, who was briefly reported missing after leaving his home in the evening or Feb. 8 or the morning of Feb. 9. He did not have a cell phone on his person nor was he driving a car.

After the police alert, Williams was found and reunited with his family.

It’s important to note that there is no formal waiting period for reporting a missing person in Texas. If you have reason to believe someone is missing as a result of abduction by a stranger, under suspicious circumstances, or for more than 30 days, contact the authorities and report it.