A 15-ft-deep excavated sewer trench in Baltimore that collapsed June 5, killing a 20-year-old construction worker, was not fitted with required safety shoring, according to investigators. Kyle Hancock, an employee of R.F. Warder Inc., White Marsh, Md., was working on the sewer line when the trench walls gave way. First responders rescued two other workers immediately, then spent 10 hours digging through dirt and debris to recover Hancock’s body. Although investigators have yet to determine what influence, if any, the region’s recent heavy rains had on the collapse, state and federal regulations mandate protective shoring and other safety measures in construction trenches more than 5 ft deep. The city has suspended its $13-million contract with R.F. Warder.