New Orleans —New Orleans police arrested suspects in two recent high-profile violent crimes, including a man accused of shooting his estranged girlfriend and killing her mother.

Police say that Keith Phillips, 22, turned himself in to police on Wednesday morning and was booked with second-degree murder and attempted second-degree murder. Phillips had been wanted in connection with the fatal shooting of Tiesha Nix, 40, and the wounding of her 25-year-old daughter on Monday night.

Police have said that Phillips shot Nix after she came to pick up her daughter from an eastern New Orleans apartment complex where the daughter was arguing with Phillips.

Police also arrested Darnell Lyons, 18, on Wednesday and booked him with attempted second-degree murder. Lyons is accused of stabbing a 16-year-old boy at Pontchartrain Park on Sunday afternoon after fighting with the teenager. Police also say that Lyons used a stun gun on the boy.

Police are still searching for a woman they say handed Lyons the knife he used in the stabbing, according to a video of the incident.

NOPD spokeswoman Remi Braden said police are still searching for Larry “Sly” Haynes, 38, who they say shot his girlfriend in front of her children on Saturday morning, and then wounded three other people.

Braden said authorities believe that when Haynes shot Tiara Reynolds, 32, he was also wounded and may need medical attention. Police suspect that someone in the city is illegally aiding Haynes. Helping a homicide suspect could lead to up to five years in prison, Braden said.

Haynes is wanted for first-degree murder and three counts of attempted first-degree murder.