A 27-year-old cook was shot twice in the leg as he left work at a restaurant on the 4900 block of Catharine Street around 10:30 p.m. Monday.
He was taken to the hospital in stable condition.
When police arrived, they noticed a blood trail stretching a full block.
That led officers to a 28-year-old man who had been shot four times.
Police say they found a gun near him.
He was taken to the hospital in critical, but stable condition.
The 28-year-old is also in custody for questioning.
Police are checking area surveillance cameras for help in their investigation.