Man arrested in Illinois

Michael O'Neal Fleming, 33, stands accused of one count of murder in connection with the Oct.

Fleming killed parents at home

Authorities also believe Fleming killed his mother, 59-year-old Rena O'Neal, and her husband, 57-year-old Rodney Brushwood, at the couple's apartment on Washington Road in Kenosha.

Gas station shooting

At 5:50 a.m. on Oct. 13, first responders were called after a customer found the clerk lying dead behind the counter.

Fleming purchased drink

In the surveillance footage, Fleming is allegedly seen purchasing a drink before going behind the counter to attack and shoot the clerk.

Fleming fled on foot

After that, the suspect is seen fleeing on foot, police said.

Twin brother's text

According to law enforcement in the Badger State, Anthony O'Neal Fleming allegedly told investigators that his brother had recently contacted him via text message and was acting erratically.

Brother refused address

The twin brother went on to say the defendant had asked for their parents' address, which he refused to provide.

Twin spoke to mother

After that, the twin spoke to his mother, who said the defendant was in Chicago.

Brushwood missing

One of Brushwood's employees ultimately reported that Brushwood had not been into work for several days, and requested a welfare check on Oct. 19.

Parents found dead

During the ensuing search, O'Neal and Brushwood were found dead inside their home. Police said the couple had been shot to death and appeared to have been dead for several days before they were found.

Investigation connects cases

After the grim discovery, investigators connected the two cases and issued an alert asking the public to contact them and warning that Fleming was 'believed to be armed, dangerous and unstable.'

Search ended in Chicago

The search ended Tuesday night in Chicago.

Fleming detained in Chicago

The defendant is currently being detained in Cook County pending extradition to the Badger State, according to a report by Chicago-based ABC affiliate WLS.

Fleming's mental health

A detective told WITI, 'We don't know if this was random or targeted.You know, they came into the store, they purchased an item, like I said, didn't take anything, so it wasn't a robbery.

“We don't know if this was random or targeted. You know, they came into the store, they purchased an item, like I said, didn't take anything, so it wasn't a robbery. So, we're trying to find out if it was targeted or not.”