IRVING, Texas (AP) — The Dallas Cowboys have signed La'el Collins, the former LSU offensive tackle who had been a projected first-round pick in last week's NFL draft until his name came up in a police investigation.

The 2014 All-SEC selection has never been named a suspect or person of interest in the shooting death of 29-year-old Brittney Mills. Police acknowledged days before the draft that they wanted to talk to Collins because he knew the victim, who was eight months pregnant with someone else's child when she was gunned down at her home in late April.

After the draft, Collins met with police, who say he has answered all of their questions.

More NFL news:

— Ed Reed came into the NFL as a member of the Baltimore Ravens, and now he's leaving as one. The nine-time Pro Bowl safety has formally announced his retirement after signing one final contract with the team that took him 24th overall in the 2002 draft.

— The Oakland Raiders have signed receiver Amari Cooper, the fourth player taken in the NFL draft. Cooper is the career receiving leader at Alabama with 228 catches, 3,463 yards receiving and 31 touchdown receptions. He led the nation with 124 catches last season and ranked second with 1,727 yards receiving and 16 touchdown grabs.

— First-round draft pick and former Louisville receiver DeVante Parker has signed a four-year, $10.87 million pact with the Miami Dolphins. The Dolphins have signed all seven of their picks.

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