Shoddy Roof Workmanship Exposed

This is a roof I looked at in Plano, Texas. The roofer used mix matched shingles on the entire house. Each slope has a different color and style. One slope actually has a mixture of two different shingles. Several shingles were torn around vents, some shingles are missing, nails are exposed and were not sealed, flashing was not done correctly around the chimney, and the ridge caps are not installed correctly. Unfortunately the homeowner is trying to sell his house and may end up replacing his roof again....The 2nd time in 6 months!