Potential Fourth Victim of Tampa Serial Killer Found, Police Say

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A Florida man walking to church to feed the homeless is believed to have become the fourth victim of a serial killer terrorizing Tampa.

Ronald Felton was fatally shot just blocks from a memorial honoring three people who were killed within days of one another in the neighborhood of Seminole Heights in Tampa.

Tampa Police Department Public Information Officer Steve Hegarty said it is not known if the death is connected to the three October murders, but said it will be treated as such until authorities can rule it out.

As police scoured the area for a suspect, residents were told to lock their doors and stay in place.

"We need folks to think about everything they heard last night and everything the saw this morning," Tampa Mayor Bob Buckhorn said during a press conference Tuesday morning. " ... We need to catch this killer before we have to notify one more family that their loved one is dead."

Felton, a father of three adult children, was on his way to feed the homeless at New Seasons Apostolic church when he was shot, his brother told NBC News. James Felton said when his 60-year-old sibling wasn't at his construction job, he spent every Tuesday and Thursday morning at the church.

Ronald Felton was on the phone with his twin brother just moments before the shooting took place.

"The people he works with were already there and they heard four shots," James Felton told NBC News. "His twin brother didn't hear it."

At approximately 5 a.m. on Tuesday, police patrolling the area received a call of shots fired and were at the scene within a minute, police said.