Grand Prairie maintenance worker checking pipes killed by person who thought he was a burglar, police sayGRAND PRAIRIE, Texas - A 53-year-old maintenance worker was shot and killed on Christmas Eve while checking to see if pipes at a Grand Prairie apartment complex had burst.Cesar Montelongo was checking the pipes at the Clayton Point Apartments on Alouette Drive, where several pipes had ruptured.READ MORE: Burst pipes from arctic blast causing Christmas issues for people across North TexasGrand Prairie police say Montelongo was on a resident's balcony at around 6 p.m. when the resident spotted him.Cesar Montelongo (Courtesy: Montelongo Family)READ MORE: Man dressed as woman allegedly took photos of women in restroom, pulled pepper ball gun at Hulen MallThe resident stayed at the scene and is cooperating with detectives.The case is under investigation and Grand Prairie detectives will refer the case to the Tarrant County grand jury for review."