Some asshat smashed up my neighbour's potplants and cacti then targeted my mum's flowers

My neighbour has cancer and just had surgery to remove polyps, she woke up this morning upset to find her little potplants and cacti had been smashed up during the night and told my mum about it. They soon discovered someone chopped the heads off my mum's beautiful Narcissus flowers! Who would do such an awful thing? well, there's 3 suspects- the brats at the end of the street whose house is so big it borders the unit I live in as well as the one in front, and the weirdo from #5 who has a thing about bashing the fences and throwing rocks and being an all-round shitheel. He's accused my parents of torturing his cat (which we hadn't seen for several years at the time) and stuffed our mail boxes with copies of my state's laws regarding drugs (implying the units were all drug labs?) and has frightened the sweet old lady who lives next to him by putting up cameras in the yard where he can film over the fence on her property.