Police are hoping some new clues will help lead them to the man they believe stabbed a six-year-old boy and an 18-year-old woman to death in Brooklyn this past weekend.
The most recent incident happened Sunday night.
Prince Joshua Avitto was stabbed to death in an elevator at the Boulevard Houses. Seven-year-old Mikayla Capers was also stabbed and is in critical condition after undergoing surgery.
A funeral for Avitto is scheduled for Friday.
The parents of both victims are pleading for anyone with information to come forward.
Friends of the young stabbing victim also spoke to reporters Tuesday.
"He [PJ] always used to come to my mom and ask if I could come outside with my basketball and everything. And he used to pretend he was Batman and stuff. And Mikayla she used to like jump rope and like girly stuff," said one friend.
"I can't wait to see Mikayla and it's so sad that PJ, PJ's not here anymore," said another friend.
"I take him everywhere with me now. When I didn't do that before I was trying to allow him to have a little freedom. But now I have to use extreme caution, and extreme supervision, high levels of supervision for all the children," said one parent.
Authorities say a knife recovered at the scene was used in the attack.
The NYPD also says they have lifted fingerprints from the elevator and are analyzing DNA found on the knife.
It's the same type of weapon used in a similar attack on Friday night.
Investigators say Tanaya Copeland, 18, was stabbed multiple times on Stanley Avenue near Linwood Street and later died.
A $12,000 reward is being offered for information leading to an arrest.
Police say they are concentrating on homeless shelters and men recently released from prison.
There are now patrols throughout East New York, especially near the building of Sunday's elevator attack.
"The neighborhood and the community is feeling a little bit more confident about the efforts to get this person apprehended," said Community Board 5 President Andre T. Mitchell.
Police describe the suspect as a black male, 25 to 35 years old, six feet tall, heavy set, wearing a grey shirt.
Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.
Meantime, a plan to place security cameras around the Boulevard Houses reportedly was approved by the city on Monday, one day after the two children were stabbed.
Reports say $500,000 was allocated last July for the city Housing Authority to install the cameras.
NYCHA officials then met with police and tenants to decide where to the cameras should go and a final plan was reached this past March.
A spokesperson for the Housing Authority says the agency submitted its plan to the Mayor's Office of Management and Budget on May 2 after getting an engineering design from its contractor.
According to the Daily News, the Office of Management and Budget approved the camera plan Monday.
However, the mayor's office did not respond to questions from the News about why the plan was not approved sooner.