New Orleans police on Thursday arrested the man they believe killed 13-month-old Londyn Samuels while in the arms of her babysitter.

New Orleans police officers and U.S. Marshals found 19-year-old Darnell Ramee in a home in the 2900 block of Parish Avenue, said Remi Braden, a department spokeswoman.

Ramee was booked with first-degree murder and attempted first-degree murder in the death of Londyn and the shooting of her 18-year-old babysitter.

Police on Wednesday booked 24-year-old Keelen Armstrong, Ramee’s alleged accomplice, on the same charges.

Londyn died shortly after she was shot last Thursday night while her babysitter carried her in the 2800 block of South Saratoga Street. The babysitter was shot twice in the back and remains hospitalized.

“This is phenomenal work done by our homicide division. I can’t praise these detectives enough,” Police Superintendent Ronal Serpas said in a prepared statement. “Detective Robert Barrere, who was the lead in this case, was tenacious, and I had no doubt that he and our team would wrap up this case. I’m hoping the people of this neighborhood can rest a bit easier tonight.”

Also on Thursday, a person of interest in the murder of 11-year-old Arabian Gayles met with police to discuss that case.

Police believe Keith Ward, 33, has information about the person or people who opened fire on Arabian’s house in the 1300 block of General Ogden Street early Monday morning, killing her and wounding an 11-year-old cousin and a 38-year-old man who was in the home.

Ward is not a suspect in that case, police have said.