Who is Gary R. Collins, PH.D. from The Case for Christ and what is their importance?

Among Strobel's expert witnesses, Gary Collins holds a master's degree in psychology and a doctorate in clinical psychology. He has taught, studied and written in his field for more that 35 years. In fact, he has written almost 150 articles and authored 45 books including The Magnificent Mind; Family Shock; Can You Trust Psychology?