A pepper-spray incident involving a group of teens the week before the brutal slaying of a Delta, B.C., teen is not connected to her death, police say.

Delta police renewed their plea for information in the case Friday morning at a press conference at the park where Laura Szendrei was brutally beaten nearly two weeks ago.

Const. Sharlene Brooks said although investigators are working through more than 350 tips they have yet to make any arrests.

Szendrei was found fatally injured on a trail in Mackie Park on September 25. She was heading to a football game at a local high school when she was attacked in broad daylight. She died in hospital the following day.

Brooks said police hope to jog the memory of anyone who may have been in the park and saw or heard something.

"You may have encountered someone and that might have been just as simple as a nod and a greeting and you're not sure they belonged in the area," Brooks said.

"Please come forward if you had any interactions with people in that time frame, either before or after."

A person of interest in her death, a man described as a 16 to 25-year-old with a medium build, has yet to come forward. He was seen either texting or talking on the phone leaving the park the afternoon of the murder.

Investigators still can't say whether the incident was random or targeted. Police are still hoping more people come forward who were in the park, especially the wooded area where Szendrei was found, in the hours between 9 a.m. and 2 p.m.

"We want to speak to them, anyone who may have seen or heard or observed anything suspicious or out of place," Brooks said.

Brooks says investigators are looking back at assaults against women on nearby running and walking trails to see if there are any connections.

She urged people using the park to stay in well-lit areas and to travel in groups.

"What we're seeing still, after all these reminders, is people running with headphones in both ears. They're unable to hear what's going on around them."

Nicole Yuen, one of the people who found Szendrei, was also on the sidelines at the Friday news conference.

"We're supporting Laura and her family," she said when asked about why she came to hear police.

Yuen didn't want to talk about what she saw that day. She and her friends are still scared.

"We're try not to be, but we have to be," she said. "This is happening in Delta."

Keith Joy has lived in the area for 30 years and said the murder has changed the neighbourhood.

"Before you wouldn't lock your doors," he said. "I think our neighbours are watching all the time. Everybody's kind of getting more together now."

After listening to the police news conference, Joy said it sounded like the investigation is slowing down.

"I don't think they've got any more information. I hope I'm wrong."

More than 500 people have signed an online petition to rename Mackie Park in Laura's honour.

With files from The Canadian Press