Soon after a rapper affiliated with Lil Wayne allegedly took part in a double killing that left two brothers dead and shell casings littering a suburban street in New Orleans East last month, he took to Instagram with a tribute to one of the victims.

“Love u Blood,” Widner “Flow” Degruy wrote in one post. “(W)e was just turning up at da tune show.”

But New Orleans police said Tuesday that despite the 23-year-old Degruy’s online show of sympathy, he was involved in killing fellow rapper Kendrick Bishop, 22, and Bishop’s 18-year-old brother Kendred on Memorial Day. Both men were shot inside a black Kia in the 4800 block of Bright Drive about 5:45 a.m. May 25.

NOPD spokesman Officer Frank Robertson said police had obtained an arrest warrant for Degruy and intended to book him on two counts of second degree murder. They are still looking for an unidentified second suspect.

Since the shooting, Degruy has twice taken to Instagram with memorials to the older Bishop, an aspiring rapper who was known as Muddy Cup Buddy.

Degruy called Bishop “one of da illest” in one post.

Police said they identified Degruy with the aid of “citizen participation.” They believe one surveillance video may show Degruy and the other suspect running from the scene. Another video may depict the pair making a purchase at a nearby store.

Degruy was signed to Wayne’s Young Money Entertainment label in 2012. He appeared as a featured artist on Wayne’s single “Off Day” last year. A December posting on the label’s website noted that Degruy celebrated his birthday with Wayne and label head Mack Maine.

Degruy was previously arrested on a count of attempted murder in St. Bernard Parish in 2013 for allegedly shooting at another man and robbing him. Court records show that case was dropped when the victim did not show up to court.

Followers expressed their surprise on social media soon after news of the arrest warrant for Degruy was announced.

“But wait why he talking bout RIP but killed them people,” one said.

“Trust no one,” wrote another.