My other half experienced something similar, though, not completely sure it was malice. Her experimental results she had gathered for 6 months were kept on ice

My other half experienced something similar, though, not completely sure it was malice. Her experimental results she had gathered for 6 months were kept on ice while she performed the necessary steps for the next stage. Another grad student "cleaned" the freezer locker and left only her experiments out. She lost 6 months of work. That grad student denied all involvement even though that grad student had been seen pulling everything out. It happens all the time, too.