11:05 AM PT — TMZ Sports has obtained Dority’s mug shot. Jail records show he’s still in custody.

LAWRENCE DORITY mug shot

9:15 AM PT — Police tell TMZ Sports … Payne was shot and killed early Monday morning in Florida.

According to the Orange County Sheriff’s Office, officers responded to a report of a shooting at around 1:37 AM and discovered Payne suffering from a gunshot wound.

Cops say Payne was transported to a hospital, but later died there.

A spokesperson for the sheriff’s office says 29-year-old Lawrence Dority was identified as the shooter … and was ultimately arrested on a warrant for first-degree murder.

Former Michigan State men’s basketball star Adreian Payne has died … his former teammate announced on Monday. He was just 31 years old.

Details surrounding the death have not yet been revealed … but Jared Sullinger — the former Ohio State Buckeyes star who played with Payne at some point in their basketball careers — announced the sad news via his Twitter page.

"Hate the news i received this morning…." Sullinger said in a tweet. "Rest Easy to my brother/Teammate @Adreian_Payne."