Crime Parents 'on Edge' After Razor Blades Repeatedly Discovered in San Diego Park Police have found razors nestled in the grass six times since August 2013, and say the cases appear linked By Christine Pelisek Published on January 28, 2015 05:55 PM Share Tweet Pin Email The first razor blades were found in San Diego’s picturesque Bonita Cove Park two years ago. Police say the blades were nestled in the grass, not fully planted, but with the sharp part facing upwards. “They were planted enough that they stay in the earth so the wind doesn’t knock them over,” San Diego Police Department Officer Mark Herring tells PEOPLE. “They are even with the grass blades.” At first, police believed the August 2013 incident was isolated, but since then they have found blades on the ground at the park five more times. Now, police believe the cases are linked. “People are on edge,” says Herring. “It has been going on so long. They don’t know who is doing it, but they do believe it is the same person or people responsible for all the cases. The public is concerned because the person seems to be targeting kids. People don’t want to get hurt and they don’t want their kids to get hurt.” Herring says most of the cases involve multiple blades. The suspect, he says, is most likely familiar with the park – which features an open green space with a playground, picnic area, and barbecue grills – and lives nearby. “It makes sense if it is someone living in the area and frequents the area at night,” he says. In one case, two blades were discovered near a playground. In another case, a mother reported that her two sons, ages 7 and 15, stepped on blades and cut their feet. On at least once occasion, seven or more blades were planted in the park at the same time, says Herring. Last Sunday, a mother playing with her two-year-old son found an extended box cutter in the sand near the playground area. “It was kind of planted somewhat in the ground,” says Herring. “It could have fallen out of someone’s pocket, but based on the history it is believed it was planted there intentionally.” Anyone with information about the case is asked to call San Diego Police Department s Northern Division at (858) 552-1700 or the Crime Stoppers anonymous tip line at (888) 580-8477. Officials have offered a $2,000 reward for information leading to the arrest of the culprit.