An attorney suing the federal government over the 2009 mass shooting at Fort Hood, Texas, said he expects plaintiffs lawyers are paying close attention as the investigation into this week’s fatal shooting at the base unfolds.

Specialist Ivan Lopez, 34, fatally shot three people and wounded 16 others at Fort Hood on April 2 before dying of a suspected self-inflicted gunshot wound. It was the second mass shooting at Fort Hood since 2009, when Army Maj. Nidal Hasan killed 13 people and wounded 32 others.